Client: Add Table of Contents to docs page

[TiE23]

I think with some more nested arrays and objects in docExploder() I could get a basic table of contents created. It'd just be at the top of the page. I think doing some form of sidebar might be too hard to do... though who knows, maybe the sidebar can go on the right side?

I think I could do something neat like check the depth of the leaves to determine the table... Or something basic like checking the as props and determining level by hardcode.

Actually, it'd probably be a new function that'd check the address array length and then from there build a list component or something simpler.