DeepSeek Harness Plugin: DSH Plugin Hub

`@czj-git/dsh-plugin-hub` is a community plugin for DeepSeek Harness, designed to integrate the DSH Plugin Hub ecosystem. It supports both Settings pages and conversation tools to provide plugin search, compatibility checks, installation management, and task status tracking. Installation requires Node.js `^22.19.0 || >=24.0.0` and a Web profile environment. The plugin proxies browser cross-origin requests, helping developers easily browse, install, and manage local plugins.