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/@radix-ui/react-compose-refs/README.md

@@ -0,0 +1,13 @@
+# `react-compose-refs`
+
+## Installation
+
+```sh
+$ yarn add @radix-ui/react-compose-refs
+# or
+$ npm install @radix-ui/react-compose-refs
+```
+
+## Usage
+
+This is an internal utility, not intended for public usage.