Drop-down JS interface for Literal choices

[liamhuber]

E.g.

@as_function_node
def Choice(choose: Literal["a", "b", "c"]):
    chosen = choose
    return chosen

Should represent with a drop-down menu for choosing a, b, or c.

I swear I've seen drop down menus here before, but it might have been in Joerg's version. At any rate, the example above is not enough to give the desired behaviour on main right now.

[pmrv]

It might have been in Joerg's code. I'd like it too, but the current version can't do it.

[liamhuber]

Alright, thanks for the quick confirmation that I'm not just failing to find an existing feature!