GeofenceService class abstract

Service interface for geofencing operations.

Example:

// Add a circular geofence
await Locus.geofencing.add(Geofence(
  identifier: 'office',
  latitude: 37.7749,
  longitude: -122.4194,
  radius: 100.0,
  notifyOnEntry: true,
  notifyOnExit: true,
));

// Add a polygon geofence
await Locus.geofencing.addPolygon(PolygonGeofence(
  identifier: 'campus',
  vertices: [
    GeoPoint(latitude: 37.42, longitude: -122.08),
    GeoPoint(latitude: 37.43, longitude: -122.08),
    GeoPoint(latitude: 37.43, longitude: -122.07),
    GeoPoint(latitude: 37.42, longitude: -122.07),
  ],
));

// Listen to geofence events
Locus.geofencing.events.listen((event) {
  print('Geofence ${event.identifier}: ${event.action}');
});