refactor: better project structure

wp-content/themes/ccat/app/graphql/menuItems.gql

@@ -0,0 +1,19 @@
+fragment MenuItem on MenuItem {
+  id
+  label
+  to: path
+  target
+}
+
+query menuItems($location: MenuLocationEnum!) {
+  menuItems(where: {location: $location, parentDatabaseId: 0}) {
+    nodes {
+      ...MenuItem
+      childItems {
+        nodes {
+          ...MenuItem
+        }
+      }
+    }
+  }
+}