Publish SDK + MCP server to PyPI, create first GitHub Release

[gn00295120]

Background

cf-browser SDK and MCP server are not yet on PyPI. Publishing enables easy installation for Claude Code users and increases project visibility.

Steps

1. Ensure pyproject.toml has correct metadata for the SDK package
2. Add classifiers and entry points for MCP server
3. Build: python -m build
4. Upload to PyPI: twine upload dist/*
5. Create GitHub Release for the initial version
6. Verify: pip install cf-browser works and MCP server starts

Acceptance Criteria

• Package available on PyPI
• pip install cf-browser works from clean venv
• MCP server can be started after pip install
• GitHub Release exists with setup instructions