DeepSeek Harness Visual Analysis Plugin

DeepSeek Harness (DSH) launches the `dsh-vision` plugin, embracing an "everything is a plugin" philosophy. By registering the `image_analyze` tool, it allows the main model to call a vision model (Google Gemini by default) for image analysis. The plugin supports PNG, JPEG, GIF, WebP, and other formats, along with multi-source inputs. Images are processed only in memory, with built-in automatic retry and security mechanisms. Users must install the plugin, configure an API key, and enable it in their profile. The agent can invoke the tool by passing an image path and a question, enabling use cases such as UI screenshot analysis and UI automation testing.