dsh-kwh2mj: Kilowatt-hours to Megajoules

dsh-kwh2mj is a DeepSeek Harness plugin maintained by uckkk for locally converting kilowatt-hours (kWh) to megajoules (MJ) without network requests, protecting privacy. The plugin is implemented in pure Node.js, and can be installed with the command `dsh plugin add github:uckkk/dsh-kwh2mj`. It depends on `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools`, making it suitable for offline environments and agent development.