DeepSeek Harness Plugin: dsh-lighting-calc for Lighting Power Calculation

The DeepSeek Harness (DSH) plugin dsh-lighting-calc is designed to address the inflexibility caused by hardcoding specific business logic in agents, based on the “everything is a plugin” philosophy. Maintained by uckkk and implemented in pure Node.js with no network dependencies, the plugin provides the `lighting_calc` tool, which performs detailed lighting power estimates based on input parameters. Users can install it via the terminal and invoke the tool directly, enabling quick integration of lighting engineering calculation capabilities into DSH workflows.