Add settings page (username, security token)

android/gradle.properties

assets/translations/en.json

assets/translations/fr.json

fastlane/metadata/android/en-US/changelogs/35.txt

fastlane/metadata/android/fr-FR/changelogs/35.txt

lib/cubit/bottom_nav_cubit.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