niyongsheng/free-vision-skill: DSH Local Image Understanding and OCR Plugin

`niyongsheng/free-vision-skill` is a DSH plugin for macOS that provides fully local image understanding and OCR services based on the macOS Vision Framework, ensuring images do not leave the local machine. This plugin is licensed under the MIT license, and its core functions include image description, text extraction, and table structure recognition. It offers two main tools: `view_image` and `ocr_image`. The former is used to describe image scenes, characters, and QR codes, etc.; the latter supports text extraction and can obtain table structure and coordinates via the `layout=true` parameter. Supported input formats include http(s) URLs, base64, and local paths. Installation requires using the `dsh plugin add` command and adding it to the configuration file...