dsh-generation-image: DeepSeek Harness Image Generation Plugin

`sfyyy/dsh-generation-image` is a plugin that provides image generation capabilities for DeepSeek Harness (DSH). Through the `generate_image` tool, it enables Agents to call OpenAI-compatible interfaces (such as xiaoyaoapi), persist generated images as DSH attachments, and display them in the UI. The plugin supports text generation, image editing, and multi-format data downloads. After installation, the Web process must be restarted, and users need to configure their own API keys and endpoints. It rewrites images into textual tokens, ensuring that text models do not directly handle image data. This plugin is part of the community-maintained DSH ecosystem and provides seamless multimodal extension capabilities for agent development.