DeepSeek Harness Notification Plugin: Task Status Monitoring and Desktop Overlay

`dsh-notify-yimit` is a task status notification plugin for DeepSeek Harness. It addresses the "status blind spot" caused by agent tasks running silently in the background. The plugin supports native Windows notifications and custom desktop floating overlays, featuring low-latency updates, stacking of multiple floating windows, real-time status updates, and click-to-open sessions. Developers can configure notification colors and display durations, optimize the experience with a resident PowerShell process, and effectively improve their control over long-running or complex approval tasks.