Feat: Convert VTree into a binary representation

[tbranyen]

A VTree shape looks like:

interface VTree {
  rawNodeName: any;
  nodeName: string;
  attributes: { [key: string]: any };
  childNodes: VTree[];
};

In the case of rawNodeName and attributes, you may be wondering how to serialize the potentially dynamic values. For now I would assume that all values are serializable. What we can do is process the VTree before any serialize code runs and ensure that those values are plucked and replaced with a safe alternative.