Add setup and deployment scripts

[glennswest]

Summary

Add two utility scripts to simplify CRUDAdmin application creation and deployment.

Scripts

setup_crudadmin_app.sh

Creates a new CRUDAdmin application from scratch:

• OS Detection: Supports Debian/Ubuntu, RHEL/CentOS/Rocky, Fedora, Arch
• Python Setup: Checks for Python 3.10+, installs if needed
• Venv Support: Installs python3-venv and build tools if missing
• Project Structure: Creates models/, schemas/, migrations/, templates/
• Dependencies: Installs FastAPI, SQLAlchemy, Alembic, CRUDAdmin
• Configuration:
  • Generates secure SECRET_KEY
  • Creates .env with configurable settings
  • Sets up Alembic for async migrations
• Branding: Prompts for app name and customizes UI title

deploy_crudadmin_service.sh

Deploys an existing CRUDAdmin app as a systemd service:

• Systemd Service: Creates service file with security hardening
• Configuration: Host, port, workers customizable
• Auto-start: Enables service on boot
• Firewall: Optional ufw/firewalld port opening
• Nginx: Optional reverse proxy setup with WebSocket support
• SSL Ready: Instructions for certbot HTTPS

Usage

# Create new app
./scripts/setup_crudadmin_app.sh

# Deploy as service
sudo ./scripts/deploy_crudadmin_service.sh

Test plan

• Test setup script on Debian/Ubuntu
• Test setup script on RHEL-based distros
• Test deploy script creates working systemd service
• Test nginx reverse proxy configuration