eventListener property

Notifier for CardLink lifecycle and interaction events.

Consolidates various events into a single stream:

• IaCardLinkEvent.willExit: CardLink will close
• IaCardLinkEvent.willStartScanning: NFC scanning is about to start
• IaCardLinkEvent.failedToInitialize: Initialization failed
• IaCardLinkEvent.goToCart: User requested to go to cart
• IaCardLinkEvent.openTermsAndConditions: User requested to view terms
• IaCardLinkEvent.cardSaved: A card was saved

Usage:

eventListener.stream.listen((event) {
  switch (event) {
    case IaCardLinkEvent.willExit:
      // Handle exit
      break;
    case IaCardLinkEvent.goToCart:
      // Navigate to cart
      break;
    // ... handle other events
  }
});