[docs] detail how eslinting/commitlinting works

[J-Vaughan]

We should summarize the airbnb guidelines, with our modifications, and having a list of the available scopes/tasks available from commitlint would be very helpful as well.

Also, issues. So far I've seen a mix of commitlint (with scope in []) and just human titles. I don't know, I guess it doesn't really matter too much what format our issues follow, because there's no real record of them in the repository.

[saihaj]

This is in my list to work on. I added this as todo in summary of #26