fix: coordinate to double

app/lib/navigation/models/directions.dart

@@ -26,7 +26,7 @@ class Directions {
     final coordinatesJson = List.from(json['features'][0]['geometry']['coordinates']);
     final List<LatLng> waypointsCoordinates = [];
     for (final coordinateJson in coordinatesJson) {
-      waypointsCoordinates.add(LatLng(coordinateJson[1], coordinateJson[0]));
+      waypointsCoordinates.add(LatLng(coordinateJson[1].toDouble(), coordinateJson[0].toDouble()));
     }
     return waypointsCoordinates;
   }