dsh-tool-accurate-vision: DeepSeek Harness Image Spatial Reasoning Tool

`dsh-tool-accurate-vision` is a plugin for DeepSeek Harness (DSH) designed to address the pain point that general-purpose vision models only provide descriptions lacking geometric facts. The tool processes images through an OpenAI-compatible interface and returns structured notes, normalized bounding boxes (0-1000), and OCR information, encapsulating the data as `<vision-context>` XML for text models to parse. Its core capabilities include structured output, SVG visualization feedback, and built-in edge distance calculation functions. By converting visual impressions into computable geometric data, the tool enables models to perform rigorous precise calculations (such as node distances), significantly improving the verifiability and accuracy of the results.