fix: Allow the mode setup/creation to be async, and provide a few more values to extension/app config/mode setup. (#4016)

extensions/test-extension/src/getCustomizationModule.ts

@@ -6,5 +6,9 @@ export default function getCustomizationModule() {
       name: 'custom-context-menu',
       value: [codingValues, contextMenuCodeItem, findingsContextMenu],
     },
+    {
+      name: 'contextMenuCodeItem',
+      value: [contextMenuCodeItem],
+    },
   ];
 }