dsh-chess-pick: Beginner's Board Game Selection

The DeepSeek Harness plugin `dsh-chess-pick` is a pure Node.js tool maintained by `uckkk`, with no network dependencies. It generates board-game learning plans based on parameters and depends on `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools`. It can be installed with the command `dsh plugin add github:uckkk/dsh-chess-pick`. After installation, its `chess_pick` function can be invoked within a conversation and runs with the current process permissions.