Replace flake8/flake8-docstrings with ruff

[MarkZH]

Type of pull request:

• Bug fix
• Feature
• Other

Description:

Flake8-docstrings is deprecated because pydocstyle
(https://github.com/pycqa/pydocstyle) is deprecated. The
checker/linter/formatter ruff is recommended in its place.

Related Issues:

N/A

Checklist:

• I have read and followed the contribution guidelines.
• I have added necessary documentation (if applicable).
• The changes pass all existing tests.

Screenshots/logs (if applicable):

N/A

[MarkZH]

We'll need to check whether everything that was covered by flake8 is still covered by ruff. Rule sets are listed here.

[AttackingOrDefending]

When I linted with --select ALL I saw that it has some nice additional warnings like Q000 [*] Single quotes found but double quotes preferred, so I would suggest enabling all rules and just disabling a few if we want (like PLR0913 Too many arguments in function definition (6 > 5), BLE001 Do not catch blind exception: Exception and FBT001 Boolean-typed positional argument in function definition).

Since ruff supports all of flake8's F rules then everything should be covered.

[AttackingOrDefending]

Since we replaced flake8 with ruff I think we should also remove flake8-markdown. It doesn't matter if ruff doesn't have an alternative for this as I don't think we have any python code on out markdown files.