* Add initial code for scaling animations, apply scale to reader nav overlay
* Rename extension function, apply system animator scale to ActionToolbar
* Apply system animator scale to expanding manga cover animation
* Apply system animator scale to image crossfade (also disables animated covers when browsing)
* Add documentation, make MotionScene Transition comment a bit more clear
* Disable animated covers in MangaInfoHeaderAdapter if animator duration scale is 0
* Disable animated covers in Library if animator duration scale is 0
* Convert loadAny listener to extension function
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