Developer guidebook
While we have some advice in our documentation on how to contribute to Autoware.Auto, we lack detailed guidance for developers and contributors. Information such as how to interact with our repository when providing contributions, how we prefer ROS node source to be structured, our ideal package types, who should click the "merge" button and when, etc. are not yet documented clearly.
This issue is to provide a place for us to note the things we need to document (possibly including what to say, but this is not required) prior to having the time to actually write up this documentation during our next maintenance cycle.