React compat layer

[tbranyen]

Before we can ship a 1.0, we need more baseline compatibility with React components. Since most components are using hooks now, we'll need to wire up support using createState and createSideEffect.

[tbranyen]

React hooks:

• [ ] useState
• [ ] useEffect
• [ ] useContext
• [ ] useReducer
• [ ] useCallback
• [ ] useMemo
• [ ] useRef
• [ ] useImperativeHandle
• [ ] useLayoutEffect
• [ ] useDebugValue
• [ ] useDeferredValue
• [ ] useTransition
• [ ] useId
• [ ] useSyncExternalStore
• [ ] useInsertionEffect

Top-level React API:

• [x] React.Children
• [x] React.Component
• [ ] React.Fragment
• [ ] React.Profiler
• [x] React.PureComponent
• [ ] React.StrictMode
• [ ] React.Suspense
• [x] React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED
• [x] React.cloneElement
• [ ] React.createContext
• [x] React.createElement
• [x] React.createFactory
• [x] React.createRef
• [ ] React.forwardRef
• [x] React.isValidElement
• [ ] React.lazy
• [ ] React.memo
• [ ] React.startTransition
• [ ] React.unstable_act
• [ ] React.version