dsh-image-reader: Image reading tool providing read_image for DeepSeek Harness Agents

`dsh-image-reader` is an MIT-licensed DeepSeek Harness plugin designed to provide image reading capabilities to text-only agents. By exposing the `read_image` tool, this plugin enables agents to utilize arbitrary OpenAI-compatible vision endpoints to parse screenshots, charts, or photos within the workspace and answer questions based on the image content. Key features include: support for inputting image paths and optional query questions; flexible configuration covering `baseUrl`, `model`, timeout settings, and allowed directories; and robust security mechanisms, such as dynamically reading API keys from environment variables, resolving paths via `realpath` to prevent symlink bypasses, and performing size and extension checks prior to upload. Usage.