test(e2e): Implement playwright testing for redesign

[ShubhamOulkar]

This PR introduces a robust End-to-End (E2E) testing suite using Playwright to ensure the stability and visual integrity of the new website redesign.

• Added tests/e2e/homepage.spec.ts covering core hero section elements (tagline, "Get Started" navigation, and version display).
• Created .github/workflows/playwright.yml
• added testing for hero, features, theme, footer, translations components

Test Artifact download URL: https://github.com/expressjs/expressjs.com/actions/runs/24755606379/artifacts/6568869583

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Lighthouse	1 paths audited Performance: 98 (🟢 up 2 from production) Accessibility: 100 (🟢 up 13 from production) Best Practices: 100 (no change from production) SEO: 100 (🟢 up 6 from production) PWA: 80 (🟢 up 50 from production) View the detailed breakdown and full score reports

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[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​playwright/​test@​1.59.1

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