dsh-free-vision: Enabling the DSH Plain Text Model to Read Screenshots, Errors, and UIs

dsh-free-vision is a free vision plugin developed specifically for DeepSeek Harness (DSH), designed to endow pure text models with image understanding capabilities. The plugin implements in-process startup through the built-in visual engine luma-mcp, eliminating the need for additional MCP service configuration, and addresses needs such as screenshot analysis, OCR, UI interpretation, and document recognition. Its core advantages include zero configuration, support for multiple free vision model providers such as Qwen, Volcengine, and SiliconFlow, and the ability to customize API addresses to adapt to different network environments. The plugin provides a single universal tool, `image_understand`, supports various task modes (e.g., OCR, debugging, description), and automatically optimizes the processing of large images. Users can quickly install it via the `dsh` command, restart the system, and then utilize the settings.