useTreeState to achieve Select/Menu hybrid (multiple selection modes, single TreeState)

[bdow]

Hi all,

I am looking to implement a select field / menu hybrid. It would be a single dropdown element with two sections, (1) selectable options, and (2) actions.
The goal is to have a resulting ListBox built from the TreeState like the below.

| Option 1     |
| Option 2     |
|--------------|
| Add new      |

I'd like the first TreeState section to have a selectionMode of "single" and the second TreeState section have a selectionMode of "none".
Is something like this possible?

[bdow]

The more I think of it, the more the question is becoming, "can you use both Options (via useOptions) and MenuItems (via useMenuItem) within the same tree state? The reason I want them in the same tree is to get the arrow key navigation to work out of the box. I would like a dropdown that has two sections: (1) a ListBox with a set of Options and (2) a Menu with a set of Actions/Menu Items.
Perhaps I'll need to use two TreeStates, one for the Options (selectionMode: "single") and one for the MenuItems (selectionMode: "none"), and smartly pass the focus between for arrow key navigation?