dsh-local-ocr: Local OCR Plugin for DeepSeek Harness

The DeepSeek Harness plugin dsh-local-ocr provides local OCR functionality based on native system capabilities. It adopts a plugin-based architecture, supports macOS and Windows, and does not modify the core source code. Loaded as a Bundle on demand, it registers the `local_ocr_image` tool for Agent invocation. Developers can also directly use its API to process images, returning stable results that include fields such as recognized text, confidence, and processing time. Installation requires using the official command and restarting the service for the changes to take effect.