dsh-conflict-guardian: Detect and handle plugin conflicts at DSH startup

dsh-conflict-guardian is an MIT-licensed plugin for DeepSeek Harness (DSH), designed to address the difficulty of troubleshooting plugin conflicts during the startup phase. By scanning the loader's runtime state and the static configuration of composition files, it automatically detects duplicate mountings, activation failures, missing dependencies, and unrunning instances, and performs actions such as disabling conflicting items or restoring instances, without modifying source code or configuration files. The plugin provides a Web interface popup to report conflict details, supports re-detection, and exposes HTTP interfaces and a `harness.handle` call entry point. In dynamic plugin mode, it also registers a `conflict_check` tool for model invocation. It requires a Node.js 20+ environment, is installed via `npm pack`, and is enabled by declaration in the configuration. Its value lies in...