api(deltachat-rpc-client): add Account.add_transport_from_qr() API

deltachat-rpc-client/src/deltachat_rpc_client/account.py

@@ -125,6 +125,11 @@ class Account:
         """Add a new transport."""
         yield self._rpc.add_or_update_transport.future(self.id, params)
 
+    @futuremethod
+    def add_transport_from_qr(self, qr: str):
+        """Add a new transport using a QR code."""
+        yield self._rpc.add_transport_from_qr.future(self.id, qr)
+
     @futuremethod
     def list_transports(self):
         """Return the list of all email accounts that are used as a transport in the current profile."""