DeepSeek Harness: Unified Private Plugin Management

`yingchao-98/dsh-private-plugins` is a client-side plugin for DeepSeek Harness, designed to provide unified management of private and local plugins. It offers a standalone entry point, supports importing plugins from cloud Git repositories or local files, and includes enable/disable, update, and permission management features. The plugin allows users to operate it through a web interface, reducing the burden of manual configuration, and is suitable for developers who need to integrate private code into Harness.