Hierarchy of our rules

[ghost]

Moved from:
#84 (comment)

linked to #59 (comment) (How to notify errors)
We also need to classify our list of errors/warning: "we should have a "scale" of words to describe the degrees of "errors" in our workflow"
I've started to split comments in two categories error (starting with 🛑 in the comment) and warning (start with ⚠️ ) but it's very basic and we should create a hierarchy of our rules