feat(docs): add comparison links to blog, common, and tutorial footers

[alicanerdurmaz]

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Bugs / Features

• Related issue(s) linked
• Tests for the changes have been added
• Docs have been added / updated
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What is the current behavior?

The footer does not include any links to the VS, Alternatives, and Compare pages.

What is the new behavior?

Comparison links (/vs, /alternatives, /compare) are added to all footers in the documentation site:

• footer-data.tsx — comparisonLinks array exported; a new "Compare" section added to menuItems
• landing-footer.tsx — automatically renders the new "Compare" section via menuItems
• blog-footer.tsx — comparison links appear as a separate muted row on mobile; inline with the nav links on desktop
• common-footer.tsx — comparison links appear after the "Tutorial" link
• tutorial-footer.tsx — comparison links appear after the "Documentation" link

fixes (issue)

Notes for reviewers

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