dsh-slope: A Slope Calculation Tool Implemented in Pure Node

DeepSeek Harness (DSH) adds the `dsh-slope` plugin, designed to provide linear regression slope calculation capabilities for model inference and data processing. Maintained by uckkk, the plugin is implemented in pure Node.js and can perform calculations locally without an internet connection. Users can install it with the command `dsh plugin add github:uckkk/dsh-slope`. Once installed, the relevant tool can be invoked in a DSH session. Because the plugin runs under the current process permissions, it is recommended to carefully review its source code and license (MIT) before installation.