PolygonGeofenceService class

Service for managing polygon geofences.

This service handles:

• Adding, removing, and updating polygon geofences
• Checking if a location is inside any registered polygon
• Emitting events when polygon boundaries are crossed

Example:

final service = PolygonGeofenceService();

// Define a polygon (e.g., a parking lot)
final parkingLot = PolygonGeofence(
  identifier: 'parking-lot-1',
  vertices: [
    GeoPoint(latitude: 37.4219, longitude: -122.0840),
    GeoPoint(latitude: 37.4220, longitude: -122.0830),
    GeoPoint(latitude: 37.4215, longitude: -122.0828),
    GeoPoint(latitude: 37.4214, longitude: -122.0838),
  ],
);

await service.addPolygonGeofence(parkingLot);

// Check if a point is inside
final isInside = service.isLocationInAnyPolygon(37.4217, -122.0834);