flutter_upi_platform_interface library

1. flutter_upi_gateway package
2. documentation
3. flutter_upi_platform_interface.dart

flutter_upi_gateway package

1. Libraries
2. flutter_upi
3. flutter_upi_gateway
4. flutter_upi_gateway_method_channel
5. flutter_upi_gateway_platform_interface
6. flutter_upi_method_channel
7. flutter_upi_platform_interface