Save measured point to file

pubspec.yaml

@@ -31,6 +31,7 @@ dependencies:
   flutter_map: ^8.2.2
   flutter_map_polygon_editor: ^0.1.2
   flutter_bluetooth_serial: ^0.4.0
+  flutter_map_geojson2: ^1.0.2
   get: ^4.7.2
   latlong2: ^0.9.1
   nmea: ^3.3.2
@@ -66,6 +67,7 @@ dependencies:
   widget_zoom: ^0.0.4
   supabase_flutter: ^2.10.2
   appwrite: ^20.0.0
+  # share_plus: ^12.0.1 
 
   flutter:
     sdk: flutter