Create documentation similar to `racecar` repo

[samparent97]

Extra note: Make sure to add flowcharts for test states such as lvstartup

[BlakeFreer]

These instructions and links will help you get started https://macformula.github.io/racecar/tutorials/site-dev/

material for mkdocs supports diagrams https://squidfunk.github.io/mkdocs-material/reference/diagrams/. Better to generate the diagrams in markdown code instead of using static images that can't be edited

[BlakeFreer]

Github pages setup. https://docs.github.com/en/pages/quickstart

The docs will be hosted at macformula.github.io/hil since hil is the name of this repo

[BlakeFreer]

What will these docs contain? It should not be an API reference for Go modules - they should be self documenting through godoc and their readmes.

This documentation should show other teams how to set up their own HIL server. When do they need to implement? How do they write states? Connect to GitHub?