feat: Refactor group deletion logic to use tripId and add reset trips functionality

lib/blocs/trip/trip_event.dart

@@ -35,6 +35,10 @@ class TripUpdateRequested extends TripEvent {
   List<Object?> get props => [trip];
 }
 
+class ResetTrips extends TripEvent {
+  const ResetTrips();
+}
+
 class TripDeleteRequested extends TripEvent {
   final String tripId;