Divide references/ articles for regression/ classification tasks

[konradsemsch]

Hi,

great package first-of-all! :)

I was going through the documentation of the package and I thought it might make sense to organise the functions per regression/ classification tasks, as they have a different level of relevance/ usefulness for each of those. I think that would help the users to structure an internal workflow of what needs to be investigated in their model audit.