TECH-151: Add InvoiceTemplating extension codegen (#197)

Author: A77AY

package.json

@@ -2,7 +2,7 @@
   "name": "@vality/domain-proto",
   "version": "2.0.0",
   "scripts": {
-    "codegen": "thrift-codegen --i ./proto --n domain_config_v2 domain payment_processing accounter webhooker"
+    "codegen": "thrift-codegen --i ./proto --n domain_config_v2 domain payment_processing accounter webhooker api_extensions"
   },
   "publishConfig": {
     "access": "public",