dsh-trim: Remove Whitespace

The DeepSeek Harness (DSH) plugin dsh-trim is designed for text cleaning to remove extra whitespace characters. Developed with Node.js, it runs offline and can register a tool directly in the session to provide text-processing capabilities. Install it with `dsh plugin add github:uckkk/dsh-trim`. Ensure the required dependencies are installed before use. It is suitable for scenarios requiring automated text-format processing in conversations or scripts.