extensions/string library

1. msk_utils package
2. documentation
3. extensions/string.dart

msk_utils package

1. Libraries
2. extensions/date
3. extensions/list
4. extensions/map
5. extensions/numbers
6. extensions/string
7. models/item_select
8. msk_utils
9. utils/base_cadastro_const
10. utils/navigation
11. utils/utils_hive
12. utils/utils_platform
13. utils/utils_query
14. utils/utils_sentry
15. utils/utils_version