Add React 19 hooks #80
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This PR adds bindings for the new React 19 hooks:
useOptimistic,useActionState, anduseEffectEvent.useOptimisticlets you show optimistic updates whilst an async action is running, and automatically reverts when the action completes.useActionStateis useful for managing form submissions with built-in pending states.useEffectEventextracts non-reactive logic from effects so you can access the latest props/state without causing the effect to re-run.I've also added Aff variants of
useActionState(useAffActionState) to match the library's existing pattern withuseAffanduseAffReducer. Both the regular and Aff versions support an optional permalink parameter for progressive enhancement.This bumps React to 19.0.0 and updates the testing library accordingly. All existing tests still pass.