dsh-plugin-cmdk: The Command Palette for DeepSeek Harness

`dsh-plugin-cmdk` is the official command palette plugin for DeepSeek Harness. It aims to consolidate session management, model switching, permission settings, and view navigation through global shortcuts (such as `Ctrl+K`), reducing mouse interaction and improving efficiency. The plugin runs entirely locally, makes no network requests, collects no telemetry data, and has a lightweight footprint. It supports fuzzy search and keyboard shortcut operations; users need to install it via GitHub and configure `settings.yaml`.