Feature request: expose `ListBox::ScrollIntoView` (or a ScrollViewer scroll setter) on the Noesis UI object model

[Shiney1965]

The Lua Noesis object model currently exposes property get/set, tree traversal (Find,
Child, VisualChild), event subscription, and command execution — but no way to
programmatically scroll a ScrollViewer/ListBox. I'd like to request one small addition:
ListBox::ScrollIntoView(item) (ideal), or alternatively a working scroll-offset setter on
ScrollViewer.

Use case:

My mod (CCNS — "CC Hair & Head Search", a character-creation QoL mod) https://github.com/Shiney1965/BG3-CC-Mod-Head-and-Hair
adds a search panel for the CC hair/head pickers. Applying a search result works assigning SelectedHair /
SelectedHead on the CC view-model), and the selection highlight renders — but the hair or head selection grid cannot be scrolled to the selected tile, so users must locate it manually in grids that are 40,000+ px
tall with 1,000+ modded entries. The mod already has the exact ListBoxItem container in hand;
the only missing piece is the scroll call.

What I verified doesn't work (SE v31, Patch 8, in-game)

• ScrollViewer.VerticalOffset (via Lua property write):** the write is accepted and reads
  back, but the view never moves, and the engine overwrites the value on the next real scroll —
  it behaves as an output-only reflection of internal scroll state.
• ls::LSScrollViewer.ScrollToElement (Larian's own scroll-to-element property, via Lua
  property write):** accepted, no effect in the keyboard CC UI.
• The same two properties set from XAML** (a b:ChangePropertyAction in a DataTemplate
  trigger, i.e. through Noesis's own SetValue path — delivery verified by also writing a marker
  value to the same target object and reading it back from Lua): marker lands, still no scroll.
  Its only usage in shipped game XAML is a controller file (PreloadedActionRadials_c.xaml,
  bound to gamepad FocusedElement), so it may be gamepad-focus-only machinery.
• There is no ScrollIntoView / BringIntoView / Focus / ScrollToVerticalOffset in the
  exposed method map (BG3Extender/GameDefinitions/PropertyMaps/UI.inl), and no occurrence of
  ScrollIntoView anywhere in the repo.

So as far as I can tell, real user input (wheel / scrollbar / gamepad focus) is currently the only thing that can scroll these panels, and no Lua- or XAML-reachable channel works.

Proposed API (any one of these would solve it)

1. listBox:ScrollIntoView(item) — item as index, VM object, or ListBoxItem; maps to
   Noesis::ListBox::ScrollIntoView.
2. element:BringIntoView() on FrameworkElement (raises RequestBringIntoView, lets the
   nearest ScrollViewer handle it) — more general.
3. scrollViewer:ScrollToVerticalOffset(number) / ScrollToHorizontalOffset(number).

Thanks for SE — the rest of the mod (live VM reads, selection apply, loca-based labels) is built
entirely on it and works great.