DeepSeek Harness Plugin: dsh-marathon-pace (Marathon Pace Calculation)

`dsh-marathon-pace` is a pure Node.js marathon pace calculation plugin for DeepSeek Harness. Maintained by uckkk, it has no network dependencies and provides parameterized calculation capabilities by registering the `marathon_pace` tool. After executing the installation command, users can directly invoke this tool in a DSH session to perform local pace calculations, making it suitable for agents that require sports computation features. The plugin runs with the permissions of the current process, and its source code is available under the MIT License.