screens/about library

1. slnic_decoder
2. screens/about.dart

slnic_decoder package

1. Libraries
2. controllers/nav_controller
3. controllers/nic_controller
4. controllers/theme_controller
5. main
6. models/nic_info
7. screens/about
8. screens/home
9. screens/result
10. theme/palette
11. theme/theme_dark
12. theme/theme_light