Add (minimal) settings page

android/gradle.properties

assets/translations/en.json

assets/translations/fr.json

fastlane/metadata/android/en-US/changelogs/11.txt

fastlane/metadata/android/fr-FR/changelogs/11.txt

lib/config/default_settings.dart

lib/cubit/settings_cubit.dart

lib/cubit/settings_state.dart

lib/main.dart

lib/ui/screens/settings.dart

lib/ui/skeleton.dart

lib/ui/widgets/bottom_nav_bar.dart

lib/ui/widgets/settings_form.dart

pubspec.yaml