Function createNotificationService

createNotificationService(options?: NotificationServiceOptions): ServiceHandler
Create a notification service handler.

The notification service is a state registry that tracks notifications per napplet window. It accepts direct notify.* service envelopes; INC topics are opaque application data and never select a host service. The shell host controls presentation through the onChange callback.
Parameters
- Optionaloptions: NotificationServiceOptions
  Optional configuration (onChange callback, maxPerWindow limit)
Returns ServiceHandler
A ServiceHandler to register with the runtime
Example
```
import { createNotificationService } from '@kehto/services';

const notifications = createNotificationService({
  onChange: (list) => {
    const unread = list.filter(n => !n.read);
    updateBadge(unread.length);
  },
  maxPerWindow: 50,
});

runtime.registerService('notify', notifications);
```
- Defined in packages/services/src/notification-service.ts:172