Add "Share Quiz" Feature with Social Media Integration

We can enable users to share generated quizzes directly on social media or via a shareable link.

**Proposed Features:**
1. Add social media buttons (Facebook, Twitter, LinkedIn, etc.) to share quizzes.
2. Generate a unique link for each quiz that users can share.
3. Include Open Graph tags for better previews when sharing links.

- Social sharing increases the platform's visibility and attracts new users.