dsh-image-vision: Integrating Vision Capabilities into Text-Only Models

`dsh-image-vision` is a lightweight plugin for DeepSeek Harness. By wrapping the `llm` service interface, it enables text-only primary models to understand images without requiring any modifications to host code or disrupting the official plugin ecosystem. It supports general image input, Feishu document parsing, and local image description, relying on visual model routing configurations with a `VL` suffix. Easy to install and highly compatible, it is ideal for integrating vision capabilities into agents without compromising the existing architecture.