extensions/data_base_reference_extentions library

1. fire_base_real_time_db package
2. documentation
3. extensions/data_base_reference_extentions.dart

fire_base_real_time_db package

1. Libraries
2. config/dependency_injection/register_firebase_real_time_db_service_get_it
3. data/data_sources/i_data_sources/i_real_time_db_crud_service
4. data/data_sources/real_time_db_crud_service_impl
5. data/enums/query_type
6. data/models/query_parameter
7. extensions/data_base_reference_extentions
8. fire_base_real_time_db