dsh-modlens: A DSH Plugin for Adding Visual Capabilities to Text-Only LLMs

The dsh-modlens plugin for DeepSeek Harness (DSH) is designed to add vision capabilities to text-only LLMs by converting images into structured JSON evidence. It supports multiple engines (such as Gemini, Doubao/Ark, and Claude). Users can configure the API key and model in a configuration file or specify the engine via parameters at invocation. Once installed and enabled, the model gains the `(modlens vision)` capability and the `modlens_read_image` tool, with support for local diagnostic verification.