models/xml_signature_config library

1. nfcsigner package
2. documentation
3. models/xml_signature_config.dart

nfcsigner package

1. Libraries
2. models/card_status
3. models/pdf_signature_config
4. models/service_result
5. models/xml_signature_config
6. nfcsigner
7. nfcsigner_method_channel
8. nfcsigner_platform_interface