dsh-juice-mix: Juice Pairing

`dsh-juice-mix` is a fun tool plugin for DeepSeek Harness (DSH) that generates drink preparation plans. Built on Node.js, the plugin depends on a specific versioned environment and is licensed under the MIT License. Users can install it using the official command, after which the tool takes effect automatically. The plugin runs with the permissions of the current process, so users should review the source code and follow security recommendations when using it.