Add horizontal scroll events to <ScrollArea>

[shaadcode]

Hi Mantine team,
Currently, <ScrollArea> supports vertical scroll events (onTopReached, onBottomReached).
It would be very useful to have similar support for horizontal scroll — e.g., onLeftReached and onRightReached — or a generic scroll event that works in both directions.
This would simplify carousels, tables, and other horizontally scrollable content, while keeping API consistent with vertical scroll.