Nomad changes

fixtures/registry/extensions_html.json

@@ -0,0 +1,15 @@
+{
+  "id": "extensions_html",
+  "category": "registry_operations",
+  "description": "Get file extensions for HTML MIME type",
+  "tags": ["registry", "extensions", "html"],
+  "call": "get_extensions_for_mime",
+  "input": {
+    "mime_type": "text/html"
+  },
+  "assertions": [
+    {
+      "type": "not_error"
+    }
+  ]
+}