dsh-plugin-live-catalog: Live Catalog of the DSH Web Plugin Directory

`dsh-plugin-live-catalog` is a DeepSeek Harness plugin designed to address the issue that traditional static plugin lists fall behind updates. It provides a real-time view of plugin status and groups plugins for display by source (official built-in, my plugins, unknown) and nine fixed categories. The plugin is zero-dependency, optimizes performance through caching, and supports search, filtering, and custom categories. After installation, it can replace the built-in plugin list tab and allows users to specify a category in the `package.json` of their personal plugins. This plugin is intended for local use only and is an unofficial project.