DeepSeek Harness Plugin: Matt Pocock Skills DSH Ported Version

`mattpocock-skills-dsh` is a DSH port of Matt Pocock’s engineering and productivity skill set, maintained by JUNQINGV587. This plugin packages 25 curated skills into a profile bundle that can be directly loaded by DSH, using a flat structure to support DSH’s first-level skill discovery mechanism. Users can install the plugin via the DSH CLI, and a profile restart is required after installation for it to take effect. As an independent fork, upstream updates must be synchronized manually. The plugin is designed to help developers quickly enable standard engineering skills in a DSH environment, making it suitable for users who want to improve development efficiency in DeepSeek Harness.