[alexeyco]

Summary

Refactor the plugin architecture while preserving existing behavior, add support for both gitui and lazygit, and compare Herdr Git plugins in the README.

• Split the implementation into adapters and feature workflows, with simpler mocked tests.
• Detect installed Git TUIs: launch the only available tool, show a picker when both are available, and show setup guidance when neither is installed.
• Use the qualified action ID alexeyco.git.open.
• Compare herdr-git with other Herdr Git plugins using the four selected criteria.
• Add a monthly freshness checker and GitHub Actions workflow for comparison release tags and source links.
• Archive the completed OpenSpec change and sync the plugin-comparison spec.

Testing

• gtimeout -k 5 300 make check
• gtimeout -k 5 300 node --test tests/comparison.test.mjs