fix(core): leave React's factory alone once the app declared its runtime

[Fiona2016]

Fixes the startup crash that #18 did not fix. Confirmed on a simulator release build, with the pre-fix build as the negative control.

What actually causes it

Patching React.createElement. Nothing subtler.

Bisected on a release build of a nativewind app:

build	result
0.1.4 as published	💥 hermes::vm::GCBase::oom → abort, SIGABRT on the JS thread
#18 (accessor skipped, read/write on the same object)	💥 same crash
both React-level patches skipped (createElement + memo)	✅ starts, reports views, records taps
only createElement skipped, memo still patched	✅ starts

So memo is not involved, and neither is how the property gets replaced. Replacing it at all routes every createElement call in the process — React's own internals included — through machinery the host wrote for its own calls. On a styling library that owns the element factory, that ends with the heap growing until Hermes aborts.

The two changes in #18 are correct on their own terms and stay. They just treat a different problem.

The fix

Skip the React.createElement patch once jsxRuntimes tells us where the app's elements come from. Under the automatic JSX transform such an app never calls React.createElement anyway — the declared runtime is what records the taps — so no instrumentation is lost. An app that declares nothing keeps the previous behaviour.

Evidence

Negative control (0.1.4 as published, same app, same config including jsxRuntimes):

Thread: com.facebook.react.JavaScript   Signal: SIGABRT
hermes::vm::GCBase::oom(std::error_code)
hermes::vm::HadesGC::OldGen::alloc(unsigned int)

With the fix, the same app starts and reports:

t_views    ApplicationLaunch, /, /login
t_actions  tap  RCTView  /login        ← taps recorded

Tests

• React's factory is untouched when a runtime was declared, and the declared runtime is still instrumented
• React's factory is still patched when nothing was declared

Full suite green (885), lerna run prepare across all 9 projects, lint clean.