domain/auth_user_credential_vo library

1. rdev_riverpod_firebase_auth package
2. documentation
3. domain/auth_user_credential_vo.dart

rdev_riverpod_firebase_auth package

1. Libraries
2. application/auth_data_service
3. application/auth_service
4. data/auth_repository
5. domain/auth_additional_user_info_vo
6. domain/auth_credential_vo
7. domain/auth_idtoken_result_vo
8. domain/auth_user_credential_vo
9. domain/auth_user_vo