Normalize app architecture

lib/cubit/settings_global_state.dart

lib/cubit/settings_state.dart

lib/cubit/theme_cubit.dart

lib/cubit/theme_state.dart

lib/main.dart

lib/models/activity/activity.dart

lib/models/data/picture.dart

lib/models/settings/settings_activity.dart

lib/models/settings/settings_global.dart

lib/ui/helpers/app_titles.dart

lib/ui/helpers/outlined_text_widget.dart

lib/ui/nav/bottom_nav_bar.dart

lib/ui/nav/global_app_bar.dart

lib/ui/pages/editor.dart

lib/ui/pages/home.dart

lib/ui/pages/player.dart

lib/ui/screens/about.dart

lib/ui/screens/activity.dart

lib/ui/screens/camera.dart

lib/ui/screens/home.dart