[Feature Request] TreeDataGrid should support expanding by double-clicking

[MeltyPlayer]

The default Avalonia tree supports double-clicking to expand rows, but TreeDataGrid doesn't seem to. This makes it a bit awkward to have both in one project, since users may be confused by behavior not aligning across similar-looking components.

I'm aware that double-clicking is also used within TreeDataGrid to enter "edit mode" for cells, but would it be possible to add support for expanding on double-click as well?