Fix an issue where types/react was a different version from our main … (#231)

Co-authored-by: Brandon Keiji <brandonkeiji@google.com>

packages/cli/vitest.config.ts

@@ -0,0 +1,15 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/// <reference types="vitest" />
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    environment: 'jsdom',
+    globals: true, // Optional: enables global APIs like describe, it, expect
+  },
+});