docs(table): add example with tree data

[ronannnn]

🔗 Linked issue

Resolves #4786

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality)
• ✨ 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

📝 Checklist

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

[pkg-pr-new]

npm i https://pkg.pr.new/@nuxt/ui@4795

commit: 0086659

[HugoRCD]

Thanks @ronannnn!

Can we collapse one of the SubRows to take up a little room in the doc?

[ronannnn]

Thanks @ronannnn!

Can we collapse one of the SubRows to take up a little room in the doc?

Sure!