HTML support

[MultisampledNight]

Likely needs #89 first.

Motivation

I do not want to open my browser only to navigate a large HTML document when I want to look at the source anyway, e.g. to find out which CSS selectors to use.

Possible problems

A lot. Can't think of any top off my head. Put some here I guess.

sidenote

this is even more absurd

[MultisampledNight]

idea for possible extension: detecting type="application/json" properties and allowing navigation into those JSON trees too.

_{wait who put the sign saying "do not do OS dev where it doesn't belong" here. i just want to have better software. wait where am i nooooo /j}