Add pydocstyle

pydocstyle is a static analysis tool for checking compliance with Python docstring conventions. It supports most of PEP 257 out of the box, but it should not be considered a reference implementation.

added TODO WIP enhancement labels

assigned to @freezed

created merge request !4 (merged) to address this issue

mentioned in merge request !4 (merged)

removed TODO label

added dev-tools label

removed enhancement label

created merge request !5 (closed) to address this issue

mentioned in merge request !5 (closed)

mentioned in commit 15e7a7f2

mentioned in commit 3528317e

mentioned in commit 78cf1c3f

closed with merge request !4 (merged)

removed WIP label