dsh-meal-plan: Fat-Loss Meal Pairing Plugin

The DeepSeek Harness (DSH) plugin `dsh-meal-plan` is specifically designed for fat-loss meal planning scenarios, with its core philosophy centered on precise parameterized calculation. Maintained by its developer, it accepts parameters via the registered `meal_plan` tool and returns detailed nutritional data. Built on pure Node.js, it requires no network requests and offers high execution efficiency. Once installed, it can be invoked directly within a session, making it suitable for agent development that requires the direct integration of nutritional calculation logic. Users should note that it runs with the current process permissions, and it is recommended to review the source code to ensure security.