chore: update repository

[johannschopplich]

🔗 Linked issue

No linked issue, but supersedes:

• chore: migrate to latest UnJS project template #9
• chore: move to pnpm #27

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR:

• Uses the latest UnJS project template (move to pnpm, Vitest etc.)
• Migrates the core library code to TypeScript.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@1a1b1b5). Click here to learn what that means.
The diff coverage is n/a.

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  Files           ?         2           
  Lines           ?        67           
  Branches        ?        23           
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  Hits            ?        67           
  Misses          ?         0           
  Partials        ?         0           

[pi0]

Thanks ❤️