dsh-superpowers-plugin: Converting the obra/superpowers Skill Library into a DeepSeek Harness Plugin

The DeepSeek Harness (DSH) plugin `dsh-superpowers-plugin` is built with zero-dependency ESM and designed to seamlessly integrate the obra/superpowers skill library into DSH, enabling an “everything is a plugin” experience. Its core features include automatic skill detection and application, direct invocation via `/commands`, automatic session guidance, version synchronization, and local overrides. After installing it with a simple command, developers can intelligently trigger skills such as TDD and debugging within a session, without manually moving files, greatly improving coding efficiency.