dsh-gold-live: Live Gold Price

`dsh-gold-live` is an open-source plugin for DeepSeek Harness (DSH) designed to address the inefficiency of agents manually querying gold prices. Implemented in pure Node, it fetches real-time gold price data online. Users only need to install the `@deepseek-ai/cordis` and `@deepseek-ai/dsh-tools` dependencies and invoke it directly in a session using the official command, without any additional configuration.