Add event catalog changes and OpenAPI tools config

Author: simonstead

openapitools.json

@@ -0,0 +1,7 @@
+{
+  "$schema": "./node_modules/@openapitools/openapi-generator-cli/config.schema.json",
+  "spaces": 2,
+  "generator-cli": {
+    "version": "7.11.0"
+  }
+}