dsh-plug-skills: DeepSeek Harness Skill Package Manager

`dsh-plug-skills` is a skill management plugin for DeepSeek Harness, providing a centralized web interface. Users can search and browse by GitHub Topic, and install or remove Agent skill packages with one click. The plugin supports fuzzy matching, batch installation, and duplicate-name detection, and enables hot loading via `skill-filesystem` without restarting. It also supports multiple GitHub proxy configuration options to handle network restrictions. Installation requires `curl` and `pnpm`. Since skills are prompts, it is recommended to install only from trusted sources.