dsh-plugin-restart-desktop: DSH Desktop Sidebar Ordered Restart Button

`dsh-plugin-restart-desktop` is a desktop plugin for DeepSeek Harness (DSH), designed to add a “Restart Desktop” button to the sidebar and eliminate the hassle of manual restarts. Integrated to the right of the gear icon in the settings row, the plugin supports confirmation prompts and language switching, and it works only for the desktop profile. Installation requires modifying `package.json` and running `pnpm install`. This plugin can also serve as a reference for plugin development.