handles library

1. base_api package
2. documentation
3. handles.dart

base_api package

1. Libraries
2. api
3. api/base_api
4. api/base_super_controller
5. base_model/base_model
6. dio/dio_manager
7. down_load/base_download_api
8. handles
9. refresh_api/base_refresh_api
10. refresh_api/base_refresh_controller
11. refresh_api/base_refresh_view
12. upload/base_upload_api