dsh-treasury-yield: Treasury Yield

The `dsh-treasury-yield` plugin in the DSH plugin ecosystem, maintained by uckkk, is designed to address network restrictions encountered by financial agents when accessing real-time data. Implemented in pure Node.js, it requires no network connectivity, calculates Treasury yields precisely based on provided parameters, and returns detailed results. After installation via a terminal command, it can be invoked directly within a session, making it suitable for offline scenarios with strict network request limitations. It is recommended to review the source code before use to verify the calculation logic.