Allow JavaScript components inside of props dict

[Archmonger]

Current Situation

Due to libraries like MaterialUI existing that have components as props, we need to spend some additional thought on how to allow JavaScript components to be added as a prop value.

Ref: #989 (comment)

Proposed Actions

We need to spend some additional thought on how to convert JavaScript components to Python components. This may result in adding some kind of that signifies "this prop value is a VdomDict containing a JavaScript child".