fix!: restructureDir defaults

[BobbieGoede]

🔗 Linked issue

• Roadmap for v9 #3002

❓ 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

The defaults for restructureDir were not being used correctly, I realised this was the case because the existing tests should have been failing 😅 I have also added the option to disable the feature temporarily for v9 by being able to set restructureDir to false.

I think after merging this it's time to have a new alpha or beta release, I think a release candidate is not far away.

📝 Checklist

• I have linked an issue or discussion.
• I have added tests (if possible).
• I have updated the documentation accordingly.

[BobbieGoede]

Oops this also includes changes to the playground, removing those

[kazupon]

LTGM!