dsh-chess-basic: A Basic Chess Learning Plan Tool

`dsh-chess-basic` is a lightweight DSH plugin developed by `uckkk` to provide agents with offline-capable basic chess learning plan generation. Implemented entirely in Node.js and without network dependencies, it registers a `chess_basic` tool that returns the corresponding chess-teaching logic based on input parameters. Users can install and enable it via `dsh plugin add github:uckkk/dsh-chess-basic`. The plugin is open-sourced under the MIT License; we recommend reviewing the source code before use to ensure security.