Marquee based on ItemsRepeater

We should consider the advantages we'd get building the MarqueeControl on [`ItemsRepeater`](https://learn.microsoft.com/en-us/windows/apps/design/controls/items-repeater) instead of manually repositioning two text segments via Storyboard/code-behind. It would require a full rewrite, but in the long term it may be worth it.

@michael-hawker I don't have experience with building a custom layout with ItemsRepeater, so any insight you could add here would be valuable.

_Originally posted by @Arlodotexe in https://github.com/CommunityToolkit/Labs-Windows/issues/548#issuecomment-2155329695_