Update to RN 0.81, Reanimated 4, FlashList 2

[andreialecu]

A few breaking changes here, this requires new architecture and reanimated v4.

Also removes MasonryFlashList because it's now just a prop for FlashList.

[andreialecu]

Released to npm as v9.0.0-rc.0 for testing

[compojoom]

Thanks for rc.0! I updated to expo 54 and v 8.0.0 was crashign on it in some situations. With v8 it works good!

[castrolem]

With v8 and this rc.0 version I'm getting a crash when navigating to the screen that contains the example code with expo router, the screen does a proper render tbh, because I can see the animation happening up to the middle of the screen before the crash. I haven't done a clean project, but I wasn't doing much, just adding a new screen that contained the same code as the example to try it out.

Update: I think this may have been related to Nativewind, I'm investigating it.

[Randall71]

I just tested this one and notice that the Flashlist version is a bit slow.
I think version 2.0.2 is used here, updating to the latest version 2.1.0 would be interesting, what do you think?