Nomad changes

fixtures/registry/extensions_docx.json

@@ -0,0 +1,15 @@
+{
+  "id": "extensions_docx",
+  "category": "registry_operations",
+  "description": "Get file extensions for DOCX MIME type",
+  "tags": ["registry", "extensions", "docx"],
+  "call": "get_extensions_for_mime",
+  "input": {
+    "mime_type": "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
+  },
+  "assertions": [
+    {
+      "type": "not_error"
+    }
+  ]
+}