Add an experimental setting for extension config (#16506)

packages/cli/src/config/settingsSchema.ts

@@ -1413,6 +1413,15 @@ const SETTINGS_SCHEMA = {
         description: 'Enable extension management features.',
         showInDialog: false,
       },
+      extensionConfig: {
+        type: 'boolean',
+        label: 'Extension Configuration',
+        category: 'Experimental',
+        requiresRestart: true,
+        default: false,
+        description: 'Enable requesting and fetching of extension settings.',
+        showInDialog: false,
+      },
       extensionReloading: {
         type: 'boolean',
         label: 'Extension Reloading',