Implemented save & load method

pubspec.yaml

@@ -2,7 +2,7 @@ name: cabo_counter
 description: "Mobile app for the card game Cabo"
 publish_to: 'none'
 
-version: 0.1.3+65
+version: 0.1.3+101
 
 environment:
   sdk: ^3.5.4
@@ -15,6 +15,7 @@ dependencies:
   url_launcher: any
   package_info_plus: any
   flutter_keyboard_visibility: ^6.0.0
+  path_provider: ^2.1.1
 
 dev_dependencies:
   flutter_test: