Cross-platform HTML module #109
Description
Implement an API for representing HTML documents. This API should present HTML nodes as an open (not opaque) data structure. It should be possible to traverse this structure, and there should be a toString function.
It should be possible to use this API for backend rendering of HTML documents.
There should also be an API in gren-lang/browser which can take this structure and use it as the basis for a virtual-dom implementation.
In short, we wish to use the gren-lang/browser HTML module as a general purpose HTML API. The same code should make it possible to backend render HTML, use it in a virtual-dom setting, and make it possible to analyse or modify HTML at runtime.