dillon1000/react

[compiler][poc] Quick experiment with SSR-optimization pass (#35102)

Just a quick poc:
* Inline useState when the initializer is known to not be a function.
The heuristic could be improved but will handle a large number of cases
already.
* Prune effects
* Prune useRef if the ref is unused, by pruning 'ref' props on primitive
components. Then DCE does the rest of the work - with a small change to
allow `useRef()` calls to be dropped since function calls aren't
normally eligible for dropping.
* Prune event handlers, by pruning props whose names start w "on" from
primitive components. Then DCE removes the functions themselves.

Per the fixture, this gets pretty far.

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[//]: # (BEGIN SAPLING FOOTER)
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with [ReviewStack](https://reviewstack.dev/facebook/react/pull/35102).
* #35112
* __->__ #35102