New TreeSelect component

[rigtigeEmil]

Description

Perhaps an addition to SelectMenu could do the trick.
It'd be nice to be able to group one or more items from a SelectMenu together, and allow the user to select the entire group at once.

https://primevue.org/treeselect/

Additional context

No response

[benjamincanac]

Actually, I'm closing this as not planned. This will not happen in v2 for sure and even for v3, there's no such primitive in Radix Vue so we can build this.

[clemjlt]

I know it's still in alpha but it seems that radix vue actually has this kind of primitive, for either Tree or TreeSelect. Of course it may be late for v3 but might be interesting to look up to ?
https://www.radix-vue.com/components/tree#with-checkbox

[benjamincanac]

It is planned to implement the Tree component already: #604. We'll add an example to use in a Popover!