dsh-median: DSH Plugin

DSH Harness has launched the dsh-median plugin for calculating the median of numeric values. Built entirely in Node.js with no network dependencies, it is easy to install. Users can enable it by running `dsh plugin add github:uckkk/dsh-median` and invoke it directly in local sessions. The plugin runs with the current process permissions, making it suitable for local data-processing scenarios. It is recommended to review its source code and license before installation.