DeepSeek Harness Plugin: Local rembg GPU Background Removal Tool

`h-table/dsh-bg-tool` is DeepSeek Harness’s local background removal plugin, processing images directly within conversations via rembg and BiRefNet. Core features include three-tier model switching, fully local GPU inference, and automatic lifecycle management. Users must configure the `.bg-tools` directory structure and enable it through JSON configuration; invoking the `remove_background` tool outputs transparent PNGs, keeping all data on the local machine throughout.