dsh-ai-pm: Integrating pm-scaffold's PRD workflow into DeepSeek Harness

dsh-ai-pm is an open-source DSH plugin developed by konwait12 that integrates the PRD workflow from pm-scaffold into DeepSeek Harness to address issues such as unverified facts being mixed into AI-inferred content, a lack of a final decision-maker, and a lack of awareness regarding changes. It adheres to an "everything is a plugin" shell design, containing only package.json, cordis.patch.yml, and lib, while preserving the upstream source code as-is to facilitate upgrades. The plugin provides seven model tools for agents: init, status, entry, gate, reflow, skill, and artifact, while the GUI side (Settings → Plugins → AI-PM) offers a requirement board. The core mechanisms include a six-state knowledge annotation (FACT/DECISION...