chore(templates): remove v3 template support

[digi-monkey]

Summary

Remove deprecated v3 templates to streamline the codebase. v3 templates are no longer maintained and v4 provides a better developer experience focused on CKB JavaScript smart contracts.

Changes

• Deleted entire templates/v3/ directory including:
  • remix-vite-template
  • next-js-template
  • js-script-next-js
• Updated templates/readme.md to reflect only v4 is available

Breaking Change

Projects using v3 templates should migrate to v4. See docs/migration.md for migration guidance.

Quality Gates

All quality checks passed:

• ✅ pnpm install
• ✅ pnpm build - compiled successfully
• ✅ pnpm test - 27 passed, 7 skipped
• ✅ pnpm lint - 0 errors (7 pre-existing warnings)
• ✅ pnpm fmt - no unformatted files

Stats

• 107 files changed
• 1 insertion(+)
• 39,038 deletions(-)

---

This PR helps reduce maintenance burden by removing outdated template code that is no longer aligned with the project's direction of focusing on JavaScript smart contract development.

[Copilot]

Pull request overview

Removes the deprecated templates/v3/ templates from the repository to reduce maintenance surface area, leaving templates/v4/ as the only supported template set and updating template documentation accordingly.

Changes:

• Deleted the templates/v3/ template directory contents (Remix+Vite, Next.js, and JS-script Next.js template variants).
• Removed associated build/test/config files within those v3 templates.
• Updated templates/readme.md to document v4 as the current template version.

Reviewed changes

Copilot reviewed 94 out of 107 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
templates/v3/remix-vite-template/tests/src/tests.rs	Removed v3 template Rust test file
templates/v3/remix-vite-template/tests/src/lib.rs	Removed v3 template Rust test harness/loader
templates/v3/remix-vite-template/tests/Cargo.toml	Removed v3 template Rust test crate manifest
templates/v3/remix-vite-template/scripts/reproducible_build_docker	Removed v3 template reproducible build helper script
templates/v3/remix-vite-template/scripts/find_clang	Removed v3 template clang discovery helper script
templates/v3/remix-vite-template/frontend/vite.config.ts	Removed v3 template Remix+Vite config
templates/v3/remix-vite-template/frontend/tsconfig.json	Removed v3 template TS config
templates/v3/remix-vite-template/frontend/tailwind.config.js	Removed v3 template Tailwind config
templates/v3/remix-vite-template/frontend/public/favicon.ico	Removed v3 template asset
templates/v3/remix-vite-template/frontend/postcss.config.js	Removed v3 template PostCSS config
templates/v3/remix-vite-template/frontend/package.json	Removed v3 template frontend package manifest
templates/v3/remix-vite-template/frontend/offckb.config.ts	Removed v3 template offckb config
templates/v3/remix-vite-template/frontend/app/routes/_index.tsx	Removed v3 template route
templates/v3/remix-vite-template/frontend/app/root.tsx	Removed v3 template app root
templates/v3/remix-vite-template/frontend/app/root.css	Removed v3 template stylesheet
templates/v3/remix-vite-template/frontend/app/entry.server.tsx	Removed v3 template server entry
templates/v3/remix-vite-template/frontend/app/entry.client.tsx	Removed v3 template client entry
templates/v3/remix-vite-template/frontend/app/components/wallet.client.tsx	Removed v3 template wallet UI component
templates/v3/remix-vite-template/frontend/app/components/wallet-client.client.ts	Removed v3 template wallet client builder
templates/v3/remix-vite-template/frontend/app/components/home.client.tsx	Removed v3 template home component
templates/v3/remix-vite-template/frontend/README.md	Removed v3 template frontend README
templates/v3/remix-vite-template/frontend/.gitignore	Removed v3 template frontend gitignore
templates/v3/remix-vite-template/frontend/.eslintrc.cjs	Removed v3 template frontend ESLint config
templates/v3/remix-vite-template/contracts/hello-world/src/main.rs	Removed v3 template sample contract entry
templates/v3/remix-vite-template/contracts/hello-world/src/lib.rs	Removed v3 template sample contract lib
templates/v3/remix-vite-template/contracts/hello-world/README.md	Removed v3 template contract README
templates/v3/remix-vite-template/contracts/hello-world/Makefile	Removed v3 template contract Makefile
templates/v3/remix-vite-template/contracts/hello-world/Cargo.toml	Removed v3 template contract manifest
templates/v3/remix-vite-template/contracts/hello-world/.gitignore	Removed v3 template contract gitignore
templates/v3/remix-vite-template/README.md	Removed v3 template root README
templates/v3/remix-vite-template/Makefile	Removed v3 template root Makefile
templates/v3/remix-vite-template/Cargo.toml	Removed v3 template workspace manifest
templates/v3/remix-vite-template/.gitignore	Removed v3 template gitignore
templates/v3/offckb.config.example.ts	Removed v3 template offckb config example
templates/v3/next-js-template/tests/src/tests.rs	Removed v3 template Rust test file
templates/v3/next-js-template/tests/src/lib.rs	Removed v3 template Rust test harness/loader
templates/v3/next-js-template/tests/Cargo.toml	Removed v3 template Rust test crate manifest
templates/v3/next-js-template/scripts/reproducible_build_docker	Removed v3 template reproducible build helper script
templates/v3/next-js-template/scripts/find_clang	Removed v3 template clang discovery helper script
templates/v3/next-js-template/frontend/tsconfig.json	Removed v3 template frontend TS config
templates/v3/next-js-template/frontend/tailwind.config.ts	Removed v3 template frontend Tailwind config
templates/v3/next-js-template/frontend/public/vercel.svg	Removed v3 template asset
templates/v3/next-js-template/frontend/public/next.svg	Removed v3 template asset
templates/v3/next-js-template/frontend/postcss.config.mjs	Removed v3 template frontend PostCSS config
templates/v3/next-js-template/frontend/package.json	Removed v3 template frontend package manifest
templates/v3/next-js-template/frontend/offckb.config.ts	Removed v3 template offckb config
templates/v3/next-js-template/frontend/next.config.mjs	Removed v3 template Next.js config
templates/v3/next-js-template/frontend/app/wallet.tsx	Removed v3 template wallet UI
templates/v3/next-js-template/frontend/app/wallet-client.ts	Removed v3 template wallet client builder
templates/v3/next-js-template/frontend/app/page.tsx	Removed v3 template main page
templates/v3/next-js-template/frontend/app/layout.tsx	Removed v3 template layout
templates/v3/next-js-template/frontend/app/globals.css	Removed v3 template global styles
templates/v3/next-js-template/frontend/app/favicon.ico	Removed v3 template asset
templates/v3/next-js-template/frontend/README.md	Removed v3 template frontend README
templates/v3/next-js-template/frontend/.gitignore	Removed v3 template frontend gitignore
templates/v3/next-js-template/frontend/.eslintrc.json	Removed v3 template frontend ESLint config
templates/v3/next-js-template/frontend/.env	Removed v3 template env file
templates/v3/next-js-template/contracts/hello-world/src/main.rs	Removed v3 template sample contract entry
templates/v3/next-js-template/contracts/hello-world/src/lib.rs	Removed v3 template sample contract lib
templates/v3/next-js-template/contracts/hello-world/README.md	Removed v3 template contract README
templates/v3/next-js-template/contracts/hello-world/Makefile	Removed v3 template contract Makefile
templates/v3/next-js-template/contracts/hello-world/Cargo.toml	Removed v3 template contract manifest
templates/v3/next-js-template/contracts/hello-world/.gitignore	Removed v3 template contract gitignore
templates/v3/next-js-template/README.md	Removed v3 template root README
templates/v3/next-js-template/Makefile	Removed v3 template root Makefile
templates/v3/next-js-template/Cargo.toml	Removed v3 template workspace manifest
templates/v3/next-js-template/Cargo.lock	Removed v3 template lockfile
templates/v3/next-js-template/.gitignore	Removed v3 template gitignore
templates/v3/js-script-next-js/pnpm-workspace.yaml	Removed v3 template workspace config
templates/v3/js-script-next-js/packages/on-chain-script/tsconfig.json	Removed v3 template on-chain script TS config
templates/v3/js-script-next-js/packages/on-chain-script/tsconfig.base.json	Removed v3 template on-chain script base TS config
templates/v3/js-script-next-js/packages/on-chain-script/src/hello-world.ts	Removed v3 template on-chain script example
templates/v3/js-script-next-js/packages/on-chain-script/package.json	Removed v3 template on-chain script package manifest
templates/v3/js-script-next-js/packages/on-chain-script/build/ckb-js-vm	Removed v3 template binary/artifact
templates/v3/js-script-next-js/packages/on-chain-script/README.md	Removed v3 template on-chain script README
templates/v3/js-script-next-js/packages/on-chain-script/.prettierignore	Removed v3 template on-chain script prettier ignore
templates/v3/js-script-next-js/packages/on-chain-script-tests/tsconfig.json	Removed v3 template test TS config
templates/v3/js-script-next-js/packages/on-chain-script-tests/tsconfig.base.json	Removed v3 template test base TS config
templates/v3/js-script-next-js/packages/on-chain-script-tests/src/hello-world.test.ts	Removed v3 template unit test
templates/v3/js-script-next-js/packages/on-chain-script-tests/package.json	Removed v3 template test package manifest
templates/v3/js-script-next-js/packages/on-chain-script-tests/jest.config.cjs	Removed v3 template Jest config
templates/v3/js-script-next-js/packages/on-chain-script-tests/README.md	Removed v3 template test README
templates/v3/js-script-next-js/packages/frontend/tsconfig.json	Removed v3 template frontend TS config
templates/v3/js-script-next-js/packages/frontend/tailwind.config.ts	Removed v3 template frontend Tailwind config
templates/v3/js-script-next-js/packages/frontend/public/vercel.svg	Removed v3 template asset
templates/v3/js-script-next-js/packages/frontend/public/next.svg	Removed v3 template asset
templates/v3/js-script-next-js/packages/frontend/postcss.config.mjs	Removed v3 template frontend PostCSS config
templates/v3/js-script-next-js/packages/frontend/package.json	Removed v3 template frontend package manifest
templates/v3/js-script-next-js/packages/frontend/offckb.config.ts	Removed v3 template offckb config
templates/v3/js-script-next-js/packages/frontend/next.config.mjs	Removed v3 template Next.js config
templates/v3/js-script-next-js/packages/frontend/app/wallet.tsx	Removed v3 template wallet UI
templates/v3/js-script-next-js/packages/frontend/app/wallet-client.ts	Removed v3 template wallet client builder
templates/v3/js-script-next-js/packages/frontend/app/page.tsx	Removed v3 template main page
templates/v3/js-script-next-js/packages/frontend/app/layout.tsx	Removed v3 template layout
templates/v3/js-script-next-js/packages/frontend/app/globals.css	Removed v3 template global styles
templates/v3/js-script-next-js/packages/frontend/app/favicon.ico	Removed v3 template asset
templates/v3/js-script-next-js/packages/frontend/README.md	Removed v3 template frontend README
templates/v3/js-script-next-js/packages/frontend/.gitignore	Removed v3 template frontend gitignore
templates/v3/js-script-next-js/packages/frontend/.eslintrc.json	Removed v3 template frontend ESLint config
templates/v3/js-script-next-js/packages/frontend/.env	Removed v3 template env file
templates/v3/js-script-next-js/package.json	Removed v3 template monorepo package manifest
templates/v3/js-script-next-js/README.md	Removed v3 template root README
templates/readme.md	Updated template documentation to reference templates/v4 only

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.