Use a configuration file for different preferences in the linter

See https://gitlab.com/top-software/general/-/issues/3#note_516840480:

Perhaps it's a good idea to have a config file from the beginning, in which we can enable and disable individual rules. That helps us to solve issues in the VIIA codebase one-by-one. As an added bonus that config file will function as a set of feature switches for the linter during later development (new linter features can be added, and might be unstable for a while, but as long as the feature switch in the config is off, it doesn't impact anything).