HTML support

[lakazatong]

HTML has a lot of similarities, I believe it wouldn't need """too much""" work to add this feature
the JSON objects will be HTML elements
and the sole list of each element will be its children

in fact, one could write (or reuse an already existing) HTML to JSON converter, maybe tweak the result a bit for this codebase, and boom, HTML support

it's always a pain to read the generated HTML of some websites (that use react for example) when developing a browser extensions for example, I often find myself reading and exploring the HTML tree in the dev tools, whereas I could copy paste it all in JSON crack :D