Add containerized service for syncing Windmill workspaces to Git repositories.
Features:
- Flask webhook server for triggering syncs from Windmill
- wmill CLI integration for pulling workspace content
- Automated Git commits and push to remote repository
- Network-isolated (only accessible within Docker network)
- Designed to integrate with existing Windmill docker-compose files
Key components:
- Docker container with Python 3.11, wmill CLI, Git, and Flask
- Sync engine with error handling and logging
- External volume support for persistent workspace data
- Comprehensive documentation (README.md and CLAUDE.md)
