DeepSeek Harness Plugin: dsh-culture-festivals

`dsh-culture-festivals` is a Node.js-based localized world festival data plugin maintained by uckkk. It works offline with locally stored data, making it suitable as a static knowledge base for agents. The plugin provides two tools, `list_festival` and `get_festival`, to query and display festival lists and details. Once installed, it can be invoked in conversations and is suitable for scenarios such as maintaining a festival calendar or offline knowledge Q&A.