falsify-dsh: Integrate public Falsify CLI into DSH to generate receipts

`shi275773124/falsify-dsh` is an adapter for DeepSeek Harness (DSH), designed to bridge the gap between Agent self-assessment and verifiable release standards by integrating the public Falsify CLI. Instead of generating a second opinion, this plugin returns the CLI's receipts—such as `PASS`, `PASS_WITH_DEBT`, or `BLOCK`—directly, ensuring that decisions are made by the CLI rather than inferred by the Agent. Core functionality includes three tools: `falsify_lint` for static checks, returning cleanliness tags; `falsify_review` for documentation review, returning final judgments; and `falsify_gate` for Pull Requests.