dillon1000/react

Fix: Resolve entangled actions independently (#26726)

When there are multiple async actions at the same time, we entangle them
together because we can't be sure which action an update might be
associated with. (For this, we'd need AsyncContext.) However, if one of
the async actions fails with an error, it should only affect that
action, not all the other actions it may be entangled with.

Resolving each action independently also means they can have independent
pending state types, rather than being limited to an `isPending`
boolean. We'll use this to implement an upcoming form API.