- Add SalesInvoiceTspSwitchService to manage TSP provider selection and sending invoices.
- Introduce SalesInvoiceTspService for creating, sending, and retrieving sales invoices.
- Implement NamaProviderSwitchAdapter for communication with the NAMA TSP provider API.
- Define DTOs for request and response structures specific to the NAMA provider.
- Enhance error handling and logging for TSP provider interactions.
