Introducing the DeepSeek Harness Dev Toolbox Plugin

`dsh-dev-toolbox` is a local toolbox designed specifically for DeepSeek Harness Web Composer, aimed at simplifying the cumbersome process of data format conversion. Maintained by Qingzhou-Joshua, this plugin supports instant conversion and processing of multiple formats, including JSON, URL, Base64, timestamps, and UUIDs. Core features include JSON formatting, minification, validation, and regex search; URL encoding and decoding; Base64 decoding (automatically ignoring whitespace); and multi-format timestamp display. All operations are performed entirely in the browser, without network transmission or disk writes, ensuring both security and efficiency. The installation command is `dsh plugin --profile web add github:Qingzhou-Jos`