dsh-salary-per-hour: Hourly Wage Calculation Plugin

`dsh-salary-per-hour` is a lightweight hourly wage calculation tool in the DeepSeek Harness (DSH) plugin ecosystem. Maintained by uckkk and implemented in pure Node, it has no network dependencies. Its core function is to register the `salary_per_hour` tool, which precisely calculates and returns detailed salary conversion results. Installation requires satisfying the version requirements for `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools`. To use it, users simply need to invoke the tool within a session. The plugin is licensed under the MIT License, and it is recommended to review the source code before installation to ensure environment security.