utils/verify library

1. i_validator package
2. documentation
3. utils/verify.dart

i_validator package

1. Libraries
2. i_validator
3. utils/confirm_password_validator
4. utils/constant/error_msg_constant
5. utils/constant/reg_constant
6. utils/email_validator
7. utils/extensions/file_validation_extension
8. utils/i_validator
9. utils/otp_validation
10. utils/password_validator
11. utils/phone_validator
12. utils/pin_number_validator
13. utils/required_field_validator
14. utils/validator_mixin
15. utils/validator_patterns
16. utils/verify