dsh-gitland: A Git Panel for DeepSeek Harness

`dsh-gitland` is a Git management plugin for DeepSeek Harness (DSH), designed to provide a GoLand-like Git tool window within the web interface. It supports commit history visualization, branch tree management, worktree operations, and AI-assisted commit message generation. The plugin integrates workflow Skills such as `/git-commit` and `/git-branch`, and provides features such as Pull and status bar display, while strictly enforcing security restrictions to ensure that commands are executed only within registered workspaces.