Improve game architecture/conception

lib/ui/screens/about_page.dart

lib/ui/screens/game_page.dart

lib/ui/screens/settings_page.dart

lib/ui/skeleton.dart

lib/ui/widgets/app_bar.dart

lib/ui/widgets/bottom_nav_bar.dart

lib/ui/widgets/header_app.dart

lib/ui/widgets/mini_game.dart

lib/ui/widgets/picked_category.dart

lib/ui/widgets/picked_letter.dart

lib/ui/widgets/previous_letter.dart

lib/ui/widgets/settings_form.dart

lib/utils/color_extensions.dart

lib/utils/game_utils.dart

pubspec.lock

pubspec.yaml