Merge branch 'language-selection' into 'dev'

assets/images/background_image_4x.png

assets/logos/exide_logo.svg

lib/appLocalization/language_key.dart

lib/appLocalization/languages.dart

lib/constants/app_images.dart

lib/constants/enums.dart

lib/constants/firebaseConstants/field_constants.dart

...nts/firebaseConstants/firebase_collections_constants.dart

lib/controller/base_controller.dart

lib/customWidget/button_widget.dart

...stomWidget/customOnboardScreen/common_onboard_screen.dart

lib/customWidget/custom_text_field.dart

...et/languageSelectionButton/language_selection_button.dart

lib/customWidget/simmerWidget/custom_shimmer_widget.dart

lib/firebaseServices/firebase_service.dart

lib/preferences/app_shared_preferences.dart

lib/res/app_color_text_size.dart

lib/routes/routes.dart

lib/routes/routes_name.dart

lib/utils/helper_class.dart