dillon1000/react

Add ReactInstrumentation

This adds `ReactInstrumentation` for the isomorphic package that uses the same approach as `ReactDOMInstrumentation`. Currently it is gated behind `__DEV__` but we will likely change this later to a runtime flag determined by whether there are any active listeners.

The first few events we add here should be sufficient for React DevTools, as determined by the `hook.emit()` calls in https://github.com/facebook/react-devtools/blob/d90c43201617d5aef378669da926d79515b6a811/backend/attachRenderer.js.

These events will also be useful for reconstructing the parent tree in the ReactPerf rewrite in #6046.