fix: resolve ES modules compatibility in E2E test files

- Replace __dirname with import.meta.url pattern for ES modules compatibility
- Add fileURLToPath imports to all E2E test files
- Fix duplicate require statements in setup-verification.spec.ts
- Update playwright.config.ts to use relative path instead of __dirname

This fixes the 'ReferenceError: __dirname is not defined in ES module scope' error
when running Playwright tests in the ES modules environment.

node_modules/react/cjs/react-jsx-dev-runtime.profiling.js

@@ -0,0 +1,14 @@
+/**
+ * @license React
+ * react-jsx-dev-runtime.profiling.js
+ *
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+"use strict";
+var REACT_FRAGMENT_TYPE = Symbol.for("react.fragment");
+exports.Fragment = REACT_FRAGMENT_TYPE;
+exports.jsxDEV = void 0;