dillon1000/react

[Fizz] Suspensey Images for View Transition Reveals (#33433)

Block the view transition on suspensey images Up to 500ms just like the
client.

We can't use `decode()` because a bug in Chrome where those are blocked
on `startViewTransition` finishing we instead rely on sync decoding but
also that the image is live when it's animating in and we assume it
doesn't start visible.

However, we can block the View Transition from starting on the `"load"`
or `"error"` events.

The nice thing about blocking inside `startViewTransition` is that we
have already done the layout so we can only wait on images that are
within the viewport at this point. We might want to do that in Fiber
too. If many image doesn't have fixed size but need to load first, they
can all end up in the viewport. We might consider only doing this for
images that have a fixed size or only a max number that doesn't have a
fixed size.