Add a projects page

A projects section pulling together everything I’ve made, from Kickoff and Design System Utils through to Otter, ZUI and xtractr.

Added a projects section to the site — side-projects, packages and other things I’ve made or am making. It pulls everything together in one place, from older work like Kickoff and Design System Utils through to the recent run of tools like Otter, ZUI and xtractr. I also surfaced a few of them on the homepage while I was at it.