Set up testdrive-jsui as a git submodule pointing to separate repository. This enables independent development and versioning of the testdrive-jsui capability. The submodule will need manual synchronization of recent refactoring changes: - Consolidated asset structure (js/, static/) - Plugin self-declaration methods - Updated README with standalone usage docs 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>