dsh-skill-editor: Edit Skills Directly in DSH Web Settings

dsh-skill-editor is a local plugin for DeepSeek Harness, designed to address the inefficiency of developers frequently switching between the browser and the filesystem to modify Markdown files. The plugin provides a visual editor on the Web settings page, supports direct modification of skill content and specific fields, and distinguishes local skills (editable) from system built-in skills (read-only). It has zero dependencies, uses native Node.js modules, and changes take effect after a refresh. To install it, run `dsh plugin --profile web add dsh-skill-editor` and restart the service.