Normalize Activity application architecture

lib/cubit/settings/settings_activity_cubit.dart

lib/cubit/settings/settings_activity_state.dart

lib/cubit/settings/settings_global_cubit.dart

lib/cubit/settings/settings_global_state.dart

lib/main.dart

lib/models/activity/activity.dart

lib/models/settings/settings_activity.dart

lib/models/settings/settings_global.dart

lib/ui/skeleton.dart

lib/ui/widgets/cards/counts_by_day.dart

lib/ui/widgets/cards/counts_by_hour.dart

lib/ui/widgets/cards/discoveries.dart

lib/ui/widgets/cards/heatmap.dart

lib/ui/widgets/cards/new_artists.dart

lib/ui/widgets/cards/new_tracks.dart

lib/ui/widgets/cards/statistics_global.dart

lib/ui/widgets/cards/statistics_recent.dart

lib/ui/widgets/cards/timeline.dart

lib/ui/widgets/cards/top_artists.dart

pubspec.lock