fix(ios): simplify emitted position for consistent values (#248)
* fix(ios): simplify emitted position for consistent values
* refactor: rename transitioning to realtime with reversed logic
- Rename 'transitioning' property to 'realtime' in PositionChangeEventPayload
- Reverse boolean logic: realtime=true means direct value, realtime=false means animate in JS
- Update iOS: TrueSheetViewController, TrueSheetView, TrueSheetStateEvents
- Update Android: TrueSheetViewController, TrueSheetView, TrueSheetStateEvents
- Update TypeScript types and ReanimatedTrueSheet
- Update documentation