feat(scroll-area): add onScroll prop

[nipsysdev]

Summary

• Added onScroll callback prop to ScrollArea component for scroll event handling
• Exported ScrollAreaProps type for TypeScript consumers
• Removed unnecessary TooltipPortal export (handled internally)
• Bumped version to 1.1.3

Changes

ScrollArea Component

• New onScroll prop accepts React.UIEventHandler<HTMLDivElement>
• Enables common use cases: infinite scroll, scroll position tracking, scroll-to-top visibility
• Backward compatible - prop is optional

Example Usage

<ScrollArea 
  className="h-full"
  onScroll={(e) => {
    const { scrollTop, scrollHeight, clientHeight } = e.currentTarget;
    if (scrollTop + clientHeight >= scrollHeight - 100) {
      loadMore();
    }
  }}
>
  {items}
</ScrollArea>