Add function to retrieve company address as JSON and update invoice procedures

- Created a new function `fds__getCompanyAddressJson` to return a company's postal address as a structured JSON object.
- Modified stored procedures `fds__createInvoice`, `fds__setInvoice`, and `fds__prepInvoice` to include a new parameter `@SendToAddressJson` for handling the address data.
- Updated the invoice table and user-defined types to accommodate the new `SendToAddressJson` field.
- Ensured that the address data is properly retrieved and stored in the invoice records.

Fuchs/appsettings.json

@@ -69,6 +69,15 @@
     "Telemetry": {
       "Enabled": true,
       "OtlpEndpoint": ""
+    },
+    "ERechnung": {
+      "Enabled": false,
+      "Profile": "EN16931",
+      "Validation": {
+        "Enabled": false,
+        "ServiceUrl": "",
+        "FailOnError": false
+      }
     }
   },
   "Fds": {