Animation-based zoom

[altavir]

Currently, zoom works discretely. Mb we could make it so it would seem smoother. For reference, we could see implementations in the android MapCompose library or multiplatform compose-MapView library, which both have smooth zooming.
MapCompose library - https://github.com/p-lr/MapCompose
compose-MapView - https://github.com/avdim/compose-mapview

Originally posted by @ArystanK in #3