[ENHANCEMENT]: Ability to cache altas sprites

[Lasercar]

Is your suggestion a solution to a problem? Please specify which one.
Altas sprites can't be cached, so every time one's loaded it adds to the memory and takes some time to load as well.

FunkinCrew/Funkin#3528

For example, here's a video with the above issue:

2025-03-07.12-17-50.mp4

Notice how every time the altas sprite is changed, it adds to the memory and causes a little stutter.

Oh, and the video also shows off a weird flicker issue too.

Describe the solution you are proposing
I'd like there to be ways to cache altas sprites, as atm, you can't (or at least, you can't cache it in a way that'd be easy enough for me to implement).

[Cheemsandfriends]

This has been on the back of my mind for some time, although it makes much more sense to develop a system like that.

It's not as easy as FlxAtlasFrames, since the reason why it freezes up is due to it having to load the animation data, but will be implemented nonetheless if its possible!