docs: Rewrite README (#511)

* Initial README changes

More to come

* Woah, fancy!

* Emojios and stuff

* Test height

* Another one

* I think it's good now

* More cool stuff

* MORE EMOJIS!!

* Rewrite table in HTML

My brain hurts

* Minor touches

* Rewording

* Some small tweaks

* Discard extra install instructions