DSH Skill Station: Sidebar Skill Management Plugin

`dsh-skill-station` is a skill management plugin for DeepSeek Harness (DSH). It integrates scanning and importing skill libraries from agents such as Claude and Codex, drag-and-drop installation, and global/project-level management into a sidebar panel. The plugin supports read-only scanning of external directories, installation from local paths, customizable configuration sources, trash management, and diagnostic repair, aiming to simplify the maintenance workflow for skill configurations.