dsh_review: DeepSeek Harness Interactive Code Review Plugin

`dsh_review` is a code review plugin for DeepSeek Harness (DSH), designed to replace inefficient traditional manual review. Through an interactive menu or commands, it allows users to quickly select a review target (such as uncommitted changes, a Commit, or a Branch) and delegate the task to the DSH Agent. After reading the diff, the Agent generates a structured report that includes severity, evidence, and fix suggestions. The plugin is available under the MIT license and requires Node.js for installation and activation. It separates target selection from code analysis, while review quality and supported diff size are limited by model capabilities and the context window.