[Tree] Implement component

[MangMax]

Is your feature request related to a problem? Please describe.

Tree is a component that we often use in development, and I noticed that it doesn't seem to be mentioned. I hope this component can be added to the development roadmap. Thank you!

Additional context

Like
naiveui

[jeremio]

NaiveUi has a lot of interesting components like cascader, tree and treeselect

[Wafje]

I would absolutely love a Tree and TreeSelect component in the next/ui suite.

Tree features:

• Control state (expand / collapse)
• Selection (single/multiple)
• Tri-state checkboxes (yes, no, child selected)
• Lazy loading
• Searchable
• Vertical navigation lines

TreeSelect features:

• Select single/multiple
• Validation

Inspired by ui-pro tried something with UAccordion today, but that did not seem te way forward.
As clicking the 'title' always opens or closes the accordion and interferes with the select action.

[ronger-x]

Are there any new developments?

[JiuRanYa]

Is there anyone willing to develop this?