dsh-burn-first-aid: Burn First Aid Tool

The DeepSeek Harness plugin `dsh-burn-first-aid` is a Node.js-based offline first-aid tool that provides burn first-aid guidance within a session. Maintained by uckkk and released under the MIT license, it allows users to invoke the `burn_first_aid` tool after installation to retrieve first-aid instructions. The plugin depends on local DSH core components, making it suitable for offline environments and intended to enhance the DSH ecosystem with specialized domain knowledge capabilities.