Mac zoom support

[janusw]

Carry-over from https://github.com/iniceice88/OxyPlot.Maui.Skia/issues/4 (reported by @KunalKshatriya):

The pan and zoom doesnt work for Mac, I fixed zoom by creating the PlatformTouchEffect for Mac (used the same file as that of iOS).

To make zoom work,

1. I added the following to the PlotController.cs,

   if MACCATALYST

   this.BindMouseWheel(OxyPlot.PlotCommands.ZoomWheel); this.BindMouseWheel(OxyModifierKeys.Control, OxyPlot.PlotCommands.ZoomWheelFine);

   endif

2. added the Pan gesture recognizer, and raised the onTouchAction

            CGPoint delta = panGestureRecognizer.TranslationInView(view);
            CGPoint point =  panGestureRecognizer.LocationInView(view);
            var touchArgs = new TouchActionEventArgs(1,
               TouchActionType.MouseWheel,
               new Point[] { new(point.X, point.Y) },
               true)
            {
                ModifierKeys = OxyModifierKeys.None
            };
            touchArgs.MouseWheelDelta = (int)((1000 + delta.Y) / 1000);
            onTouchAction(Element, touchArgs);

However, it didn't work. Is there something I am missing?