dsh-plugin-library-search: Search plugin library and install in the DSH settings page

The DSH plugin `dsh-plugin-library-search` aims to streamline the plugin installation process by integrating the previously required GitHub search workflow directly into the DSH "Settings > Plugins" page. This plugin connects to GitHub repositories tagged with `topic:dsh-plugin`, offering features such as waterfall browsing, keyword filtering, automatic loading of the next page, and one-click installation. It supports the installation and mounting of both Bundle and Cordis plugin types; the former requires a service restart to take effect, while the latter supports Hot Module Replacement (HMR) for real-time mounting. Models can also achieve automated search and installation by invoking tools such as `plugin_library_search` and `plugin_library_install`. Installation requires specifying `--profile web` and relies on a `pnpm` environment. To address...