Improve Routing, Vite -> Next.js

[zachdt]

@clemlak this is mostly a thread on using vite vs next.js.

from where the project sits today, i foresee massive complexity using react-router natively. this is making me hesitant to use vite over next.js. i understand this is a serious refactor, and will require a solid day or two of my time, so I want to field some feedback before diving into this.