Update FE development docs to match existing process
Let's identify what parts of our FE development process docs are outdated and update them. Let's also rethink this documentation holistically to see if there's anything helpful we can add for new and existing contributors.
Inspiration
Remember, the handbook is not what we hope to do, what we should formally do, or what we did months ago. It is what we do right now.
Edited by Paul Slaughter