Taking full control of editor view rendering

[Darmody]

We need to create React Portal to render react component in the prosemirror node view. It is quite intertwined for composing react component view and the prosemirror views.

I think to create our own prosemirror-view to take full control of editor view rendering in order to render react components normally is much better.

Further, we can take control of EditorState and EditorView both. This is flexible for us to switch implementation of state and view in the future. Certainly, this also means we don't need prosemirror anymore. So this is just an idea, for now. We can leave conversations about it in this discussion.

[Darmody]

In addtional, we can introduce a concept like react-reconciler, for cusomize system(editor) state and system(editor) view.