dsh-knot2kph: Convert Knots to Kilometers per Hour

dsh-knot2kph is a DeepSeek Harness (DSH) plugin designed specifically to address the unit conversion requirement from knots to kilometers per hour in maritime or aviation scenarios. The plugin is implemented in Node.js, has no network dependencies, and can be installed with the command `dsh plugin add github:uckkk/dsh-knot2kph`.