feat: add social media OG preview image support

[Kokila-chandrakar]

Summary

Added Open Graph and Twitter preview image support for social media sharing.

Changes Made

• Added static OG image at public/og-image.png
• Updated openGraph.images metadata in src/app/layout.tsx
• Updated Twitter card metadata with preview image support
• Added metadataBase for absolute OG URLs

Result

Shared Reframe links now display rich preview cards with image support on:

• Twitter/X
• WhatsApp
• LinkedIn
• Discord
• Facebook

Testing

Verified locally using:

• /og-image.png
• Open Graph metadata rendering

close #506

[vercel]

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[github-actions]

✅ PR Format Check Passed — @Kokila-chandrakar

Basic format checks passed. A maintainer will review your code changes.

This does not mean the PR is approved — it just means the format is correct.

[github-actions]

👋 Thanks for your PR, @Kokila-chandrakar!

Welcome to Reframe — a browser-based video editor built for everyone 🎬

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Quick checklist

• PR title follows Conventional Commits (e.g. feat: add dark mode)
• Linked the issue this PR closes (e.g. Closes #123)
• Tested the changes locally (bun run dev)
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Useful links

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Happy coding! 🎉

[Kokila-chandrakar]

Hi @magic-peach , could you please review and approve the pending workflows for this PR? The remaining checks are waiting for maintainer approval. Thank you!