dsh--patch: A Local JSON Patch Processing Tool

The `dsh--patch` plugin provided by DeepSeek Harness (DSH) is a local tool implemented in pure Node.js, designed to help agents handle JSON Patch (RFC 6902) operations locally without network requests. It supports creating, deleting, updating, and retrieving JSON documents, and can be used directly by invoking it in a session after installation. Since it runs third-party code on the local machine, be sure to review the source code carefully before use to ensure security.