dsh-veggie-pick: Balcony Vegetable Variety Plan Generation

dsh-veggie-pick is a plugin in the DeepSeek Harness ecosystem that focuses on balcony vegetable gardening scenarios. By registering a local tool, it returns specific planting plans based on user input parameters without relying on the network. Implemented in pure Node.js, the plugin uses the `veggie_pick` tool to meet deterministic output requirements for specific scenarios, perfectly embodying DSH's "everything is a plugin" philosophy.