dsh-cable-power: Charging Power Calculation

`dsh-cable-power` is a DeepSeek Harness local computation plugin maintained by uckkk. Its core function is to accurately calculate charging power based on input parameters using the `cable_power` tool, without relying on external APIs. The plugin is implemented purely in Node, has no network dependencies, and runs with the current process permissions. Because it involves local code execution, it is recommended to review the source code and license before installation.