Improve @apps/web SEO

[yoannfleurydev]

Summary

Enhance search engine optimization for the LunaLink landing page by adding comprehensive metadata, social sharing tags, and crawl directives. All SEO tags now properly generate in the HTML head, and the site includes sitemap and robots.txt for improved search engine indexing.

Changes

• Add OpenGraph, Twitter Card, and canonical URL metadata to layout.tsx
• Add JSON-LD structured data (SoftwareSourceCode schema) for rich search results
• Create robots.txt to guide search engine crawlers
• Create sitemap.xml for indexing
• Enhance meta description with key differentiators (size, format support)

Test Plan

• ✓ Build the app with pnpm build — verified successful static export
• ✓ Check generated HTML head for all OG/Twitter/canonical tags with correct URLs
• ✓ Verify robots.txt and sitemap.xml are in build output
• ✓ Confirm OG image resolves to correct absolute URL

🤖 Generated with Claude Code

[changeset-bot]

⚠️ No Changeset found

Latest commit: d80249b

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR