Add support for Tree and List/Table widgets

[alexmocanu]

Hello,

I've been trying to build a grid/table view to display some data, but none of the existing widgets seem to fit.
Could it be possible to add support for these please?

https://docs.gtk.org/gtk4/section-tree-widget.html

[david-swift]

Hello!

There currently is support for simple grid views with the FlowBox widget. Does this work in your case?

I can add support for the GtkTreeView either this weekend or at some point after next week.