Automate local Auto DevOps setup

This should facilitate the onboarding process by automating the manual setup one needs to do, so to start working locally with Auto DevOps.

This introduces a file flag called ./auto_devops_enabled. When the contents of this file is set to true, the developer only needs to run gdk reconfigure to have all the necessary Auto DevOps configuration setup automatically.

Before that, we had to go through a list of manual configurations as seen in our documentation