kidai-plugin-market-hub: Plugin Market Center for DeepSeek Harness

# Foreword The philosophy of DSH (DeepSeek Harness) is "everything is a plugin." As the number of plugins grows, the problem shifts from "what to install" to "where to find, how to install, and how to manage them." Plugins are scattered across GitHub topics, the npm registry, and community curated lists. Installing them requires manually parsing package names, executing `pnpm`, and fine-tuning bundle configurations. Updating and uninstalling also require returning to the command line to repeat the process. These steps are not difficult, but they must be repeated for every single plugin. **kidai-plugin-market-hub** (Jidai Plugin Market) consolidates these three tasks into a single page. It features a standalone, full-screen market accessible via a one-click shortcut in the sidebar, aggregates multiple sources, offers one-click installation, provides unified management for installed plugins, and includes built-in security defenses during the installation process. The following sections introduce its features, installation methods, and...