Add flag to ignore some functions, classes or class methods

[takos22]

My problem

I document my class initialization inside the class docstring, therefore pydocstyle complains about undocumented __init__ methods.

My solution idea

It would be great to have the ability to have a flag (for example --ignore-func) that would work for both functions, classes and class methods with maybe a regex. So for ignoring the __init__ the flag could be --ignore-func='.*\.__init__', with .* for the class name, \. to say that it's a class method and __init__ to ignore that method.

[KaleabTessera]

Would be a great feature!