dsh-plugin-desktop-notice: DSH Desktop Notification Plugin

The DSH “Desktop Notice” plugin supports native pop-up notifications and sounds for task completion, waiting for input, and failures, helping users avoid missing alerts. It includes do-not-disturb features (event merging, progressive escalation, focus time) and a full-screen silent mode. It supports built-in sounds, mobile push notifications (Bark/ntfy), TTS voice, and keyword monitoring. Install it with `dsh plugin --profile web add dsh-plugin-desktop-notice`. It supports Windows, macOS, and Linux (requires `notify-send`), and automatically disables pop-up notifications in server or WSL environments.