[Enhancement] PushModalAsync: Page transition animations

[MarcK95]

Summary

Would be very helpful if one could style the animation when pushing a page onto the stack.
Right now its animating from bottom to top and theres no possibility to change this at all.

API Changes

The boolean parameter when performing the push could be changed to a directional statement or the state of no animation at all.

e.g.
[...].PushModalAsync(new Page_A(), Left);

Intended Use Case

Provide a detailed example of where your proposal would be used and for what purpose.

[lavilaso]

In #6033 they are working on an api specification for this.

[jfversluis]

This will not happen anymore for Xamarin.Forms. If this is still important to you, make sure to check the .NET MAUI repo and see if it's already on the roadmap or open an issue with a detailed feature request. Thanks!