Description:
Integrate Playwright into the React codebase for E2E testing.

• Add Playwright as a dev dependency in react/package.json
• Create initial Playwright configuration
• Add at least one example test (e.g., homepage or login)
• Document usage and how to run tests (README or docs)
• (Optional) Suggest CI/CD integration for future improvement

Acceptance Criteria:

• Playwright is installed and configured for React
• At least one working example test
• Clear documentation for contributors
• No impact on Angular or backend code