define a type for id and use uuids instead of existing int

pubspec.yaml

@@ -4,17 +4,18 @@ version: 0.0.1
 homepage:
 
 environment:
-  sdk: ^3.8.1
-  flutter: ">=1.17.0"
+    sdk: ^3.8.1
+    flutter: ">=1.17.0"
 
 dependencies:
-  flutter:
-    sdk: flutter
+    flutter:
+        sdk: flutter
+    uuid: ^4.5.1
 
 dev_dependencies:
-  flutter_test:
-    sdk: flutter
-  flutter_lints: ^5.0.0
+    flutter_test:
+        sdk: flutter
+    flutter_lints: ^5.0.0
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
@@ -22,33 +23,33 @@ dev_dependencies:
 # The following section is specific to Flutter packages.
 flutter:
 
-  # To add assets to your package, add an assets section, like this:
-  # assets:
-  #   - images/a_dot_burr.jpeg
-  #   - images/a_dot_ham.jpeg
-  #
-  # For details regarding assets in packages, see
-  # https://flutter.dev/to/asset-from-package
-  #
-  # An image asset can refer to one or more resolution-specific "variants", see
-  # https://flutter.dev/to/resolution-aware-images
+    # To add assets to your package, add an assets section, like this:
+    # assets:
+    #   - images/a_dot_burr.jpeg
+    #   - images/a_dot_ham.jpeg
+    #
+    # For details regarding assets in packages, see
+    # https://flutter.dev/to/asset-from-package
+    #
+    # An image asset can refer to one or more resolution-specific "variants", see
+    # https://flutter.dev/to/resolution-aware-images
 
-  # To add custom fonts to your package, add a fonts section here,
-  # in this "flutter" section. Each entry in this list should have a
-  # "family" key with the font family name, and a "fonts" key with a
-  # list giving the asset and other descriptors for the font. For
-  # example:
-  # fonts:
-  #   - family: Schyler
-  #     fonts:
-  #       - asset: fonts/Schyler-Regular.ttf
-  #       - asset: fonts/Schyler-Italic.ttf
-  #         style: italic
-  #   - family: Trajan Pro
-  #     fonts:
-  #       - asset: fonts/TrajanPro.ttf
-  #       - asset: fonts/TrajanPro_Bold.ttf
-  #         weight: 700
-  #
-  # For details regarding fonts in packages, see
-  # https://flutter.dev/to/font-from-package
+    # To add custom fonts to your package, add a fonts section here,
+    # in this "flutter" section. Each entry in this list should have a
+    # "family" key with the font family name, and a "fonts" key with a
+    # list giving the asset and other descriptors for the font. For
+    # example:
+    # fonts:
+    #   - family: Schyler
+    #     fonts:
+    #       - asset: fonts/Schyler-Regular.ttf
+    #       - asset: fonts/Schyler-Italic.ttf
+    #         style: italic
+    #   - family: Trajan Pro
+    #     fonts:
+    #       - asset: fonts/TrajanPro.ttf
+    #       - asset: fonts/TrajanPro_Bold.ttf
+    #         weight: 700
+    #
+    # For details regarding fonts in packages, see
+    # https://flutter.dev/to/font-from-package