document/customization/liveness_check library

1. get_verified package
2. documentation
3. document/customization/liveness_check.dart

get_verified package

1. Libraries
2. document/customization/background
3. document/customization/camera_frame
4. document/customization/color_theme
5. document/customization/customizer
6. document/customization/indicators
7. document/customization/instructions
8. document/customization/liveness_check
9. document/customization/message
10. document/customization/multipage_processing
11. document/customization/toolbar
12. document/doc_reader_sdk_initializer
13. document/doc_reader_sdk_steps
14. document/model/scan_result
15. face/face_sdk_initializer
16. face/face_sdk_steps
17. face/model/custom_image
18. get_verified
19. screen/email_verify_screen
20. screen/register_screen
21. screen/verified_result_screen