docs(vercel): add screenshots for vercel guide

[nexxeln]

✅ Checklist

• I have followed every step in the contributing guide (updated 2022-08-15).
• The PR title follows the convention we established conventional-commit
• I performed a functional test on my final commit

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Changelog

The vercel guide looked kinda sad so I added some screenshots

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Latest commit: 78704e0

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[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
create-t3-app	✅ Ready (Inspect)	Visit Preview	Sep 30, 2022 at 10:48AM (UTC)

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟢 Performance	100
🟢 Accessibility	96
🟢 Best practices	93
🟠 SEO	86
🟠 PWA	54

Lighthouse ran on https://create-t3-app-git-nexxel-vercel-t3-oss.vercel.app/

[c-ehrlich]

Should we dump all screenshots into /public/images or does it make sense to start some kind of structure (folders that match the table of contents items or whatever)?

[nexxeln]

Should we dump all screenshots into /public/images or does it make sense to start some kind of structure (folders that match the table of contents items or whatever)?

I don't think there's a need to do this right now. But when we have a lot of images we can do it.