Scrolling with trackpad causes an event to be created

[Levi-Lesches]

Here's how we can fix it:

• add a check for details.kind == PointerDeviceKind.trackpad here, then return out of the function: https://github.com/werner-scholtz/kalender/blob/50043322a49ade38194ae9c477c5691bcb697294/lib/src/components/gesture_detectors/multi_day_page_gesture_detector.dart#L126-L130
• instead of stacking the gesture detector over the calendar, add it as a child here: https://github.com/werner-scholtz/kalender/blob/50043322a49ade38194ae9c477c5691bcb697294/lib/src/views/multi_day_view/multi_day_page_content.dart#L169-L177

That should let trackpads scroll the calendar view