dsh-season-health: Seasonal Wellness

`dsh-season-health` is a locally run DSH plugin that returns deterministic Traditional Chinese Medicine (TCM) wellness plans based on a season parameter. It has no network dependencies, is implemented purely with Node.js, and registers the `season_health` tool. Installation requires the specified versions of `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools`, and it can be added with a command. It is released under the MIT license, offering high freedom of use, but users should watch version compatibility and perform source-code security checks.