add craddrtype field, switch to structured by default for revolut

The revolut app does not seem to support the combined address type.

Luckily, switching to structured seems to not be a problem for
other apps such as the ZKB eBanking app.

qrbill.go

@@ -70,7 +70,7 @@ type AddressType string
 
 const (
 	AddressTypeStructured AddressType = "S"
-	AddressTypeCombined               = "K"
+	AddressTypeCombined   AddressType = "K"
 )
 
 type Address struct {