dsh-fx-live: Real-Time Exchange Rate Conversion

`dsh-fx-live` is a web-enabled tool plugin for DeepSeek Harness, maintained by developer `uckkk`. It addresses the issue that agents lack real-time exchange rate data when handling currency conversions by fetching the latest rates online and using them for conversion. The plugin is open-sourced under the MIT License, is easy to install, and can be invoked directly in a session without any configuration. Because it is implemented in pure Node.js, it is recommended to review the source code for security before deploying it in a production environment.