dillon1000/react

ReactDOMComponentTree

New module! With this, we have a new module that uses the component tree to store DOM nodes. Most of the logic in this file relates to markup adoption -- if we were to drop that (along with server rendering) this file could just be a `return inst._nativeNode;`.

This works with useCreateElement only because we need to reference each node as it's created.

Events is now the only thing using ReactMount.getNode -- I'll introduce pointers back from the DOM nodes (and a `ReactDOMComponentTree.getInstanceFromNode`) and make that work.