DeepSeek Harness Plugin: dsh-lamp-count Lamp Count Calculation

`dsh-lamp-count` is a DeepSeek Harness plugin focused on lamp count calculation. It is implemented natively in pure Node.js, has no network dependencies, and runs efficiently and stably. Installation requires the `@deepseek-ai/cordis (^4.0.1)` and `@deepseek-ai/dsh-tools (>=0.1.0-rc.6)` dependencies. The plugin runs in a process context; it is recommended to review the source code before use. It is suitable for scenarios that require local computation capabilities.