⚙ Configure pre-commit tool

[webknjaz]

We can now start configuring linting-related things.

Please take as a base these:

• https://github.com/ansible/pylibssh/blob/devel/.pre-commit-config.yaml
• https://github.com/ansible/ansible-lint/blob/master/.pre-commit-config.yaml#L37-L43
• https://github.com/ansible/ansible-lint/blob/master/.yamllint (but turn consistent to false)
• https://github.com/ansible/pylibssh/blob/devel/.darglint
• https://github.com/ansible/pylibssh/blob/devel/.isort.cfg
• https://github.com/ansible/pylibssh/blob/devel/.flake8
• https://github.com/ansible/ansible-lint/blob/master/mypy.ini / https://github.com/sanitizers/octomachinery/blob/master/mypy.ini / https://github.com/ansible/ansible-lint/blob/master/.pre-commit-config.yaml#L60-L67
• https://github.com/ansible/ansible-lint/blob/master/.pre-commit-config.yaml#L68-L71 / https://github.com/sanitizers/octomachinery/blob/master/.pre-commit-config.yaml#L51-L58 / https://github.com/sanitizers/octomachinery/blob/master/.pylintrc (generate the base config via pylint --generate-rcfile > .pylintrc and only then borrow things from examples, only if necessary, in separate commits, for comparison)

Since it's a lot of changes, feel free to submit separate PRs with small changes.

[webknjaz]

The example configs cap isort below v5 for flake8 but I think we can try pinning flake8-isort to use the new alpha version: https://github.com/gforcada/flake8-isort/pull/92#issuecomment-670480995.

[slsh1o]

TODO list:

• [x] add-trailing-comma

• [x] base pre-commit-hooks

• [x] pre-commit-hooks-markup

• [x] pydocstyle

• [x] yamllint

• [x] pylint (local)

• [x] darglint

• [x] isort (hook & config)

• [x] flake8

• [x] flake8-wemake-plugin

• [x] mypy