Animated zooming support

[hurelhuyag]

Is there an existing issue for this?

• I have searched the existing issues

Use case

Currently changing MapController.{zoom,center} values affects instantly. It is not convenient for most users. I think. Is there a way to make it animate?

Proposal

1. TileLayer uses Positioned to position tiles. I'd try AnimatedPositioned first.
2. Other custom layers also need to animate. I have no idea If it is good or bad to call MapLayout.builder method on animate.