dsh-road-trip-cost: Road Trip Cost Estimation

The DeepSeek Harness plugin `dsh-road-trip-cost` provides a local solution for calculating road trip costs without requiring network access. It supports accurate estimation of trip costs based on parameters and returns detailed results. The installation command is `dsh plugin add github:uckkk/dsh-road-trip-cost`. Before use, ensure that the environment dependency versions meet the requirements.