dsh-inhg2hpa: InHg to hPa Conversion Plugin

The DeepSeek Harness (DSH) plugin “inhg2hpa” provides local unit conversion from inches of mercury to hectopascals. Built on a plugin architecture, it runs without network dependencies using pure Node.js, ensuring lightweight and efficient data processing. Developers can install it with the specified command, making it suitable for scenarios sensitive to network latency or requiring local execution. It is recommended to review the source code and license before installing.