DeepSeek Harness Plugin Control: Instant Start/Stop for Third-Party Plugins

`dsh-plugin-control` is a web-based management plugin for DeepSeek Harness (DSH). It addresses the limitations of traditional configuration file management—requiring restarts and being error-prone—by providing real-time plugin start/stop, state persistence, and rollback on error. It supports Chinese and English interfaces and includes safety mechanisms to prevent accidental operation of core plugins. This tool is suitable for developers who frequently test plugin combinations and has been verified to work with DSH 0.1.0-rc.6. After installation, restart the service; plugin states can then be managed from the Web settings page.