young1lin/dsh-ui-gitworkbench: Out-of-Tree Git Workbench Plugin for DeepSeek Harness

The `young1lin/dsh-ui-gitworkbench` plugin for DeepSeek Harness (DSH) deeply integrates Git operations into DSH's web interface, addressing the pain point of developers frequently switching between terminals and editors. This plugin provides a full-featured workbench with file tree, diff comparison, history, commit synchronization, and Worktree simulation, while supporting multiple filtering options and theme switching. Users can install and enable it with a simple command, enabling efficient repository management without leaving the browser.