Add Docker deployment setup with FastAPI server implementation for Crawl4AI:
- Create Dockerfile with Python 3.10 and Playwright dependencies
- Implement FastAPI server with streaming and non-streaming endpoints
- Add request/response models and JSON serialization
- Include test script for API verification
Also includes:
- Update .gitignore for Continue development files
- Add project rules in .continuerules
- Clean up async_dispatcher.py formatting
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