docs: simplified chinese translation

[fernandoxu]

Closes #

✅ Checklist

• [x] I have followed every step in the contributing guide (updated 2022-10-06).
• [x] The PR title follows the convention we established conventional-commit
• [ ] I performed a functional test on my final commit

---

Changelog

Simplified Chinese translation

• [ ] deployment
  • [ ] docker.md
  • [ ] vercel.md
• [ ] usage
  • [ ] env-variables.md
  • [ ] first-steps.md
  • [ ] next-auth.md
  • [ ] next-js.md
  • [ ] prisma.md
  • [ ] tailwind.md
  • [ ] trpc.md
  • [ ] typescript.md
• [ ] faq.md
• [ ] folder-structure.md
• [ ] installation.md
• [x] introduction.md
• [ ] other-specs.md
• [ ] t3-collection.md
• [x] why.md

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Screenshots

[Screenshots]

💯

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: 740323fe8ddb7af3023b8e0f26cdfbaac0a0b78e

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[vercel[bot]]

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

Name	Status	Preview	Updated
create-t3-app	✅ Ready (Inspect)	Visit Preview	Nov 23, 2022 at 2:04AM (UTC)

[github-actions[bot]]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟢 Performance	99
🟢 Accessibility	100
🟢 Best practices	100
🟠 SEO	86
🟠 PWA	54

Lighthouse ran on https://create-t3-app-git-fork-fernandoxu-next-t3-oss.vercel.app/