[Chore] Create proper README for the repo

[bkrem]

• Currently the main readme for the repo is empty
• We should generate a repo readme with all essential information around using the repo and its contents

[bkrem]

@claude implement the PR for this

[claude]

Claude finished @bkrem's task in 1m 21s —— View job • claude/issue-60-20260113-0817 • Create PR ➔

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Task: Create proper README for the repo

• Analyze current README and repository structure
• Create comprehensive README with all essential information
• Commit and push changes
• Provide PR creation link

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Created comprehensive README including:

• Project overview and directory structure
• Quick start examples for main actions (Terraform, ECS, AI review)
• Key conventions for composite actions, Terraform, AWS, security
• Development guidelines and testing instructions
• Claude auto-review architecture documentation
• Workflows overview

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