ci: Force python formatting with ruff

[pieterlexis]

Short description

This enforces proper formatting of all the python files in the repository.

Checklist

I have:

• read the CONTRIBUTING.md document
• read and accepted the Developer Certificate of Origin document, including the AI Policy, and added a "Signed-off-by" to my commits
• compiled this code
• tested this code
• included documentation (including possible behaviour changes)
• documented the code
• added or modified regression test(s)
• added or modified unit test(s)

[miodvallat]

Will you update build-scripts/format-code to handle .py files then?

[pieterlexis]

Will you update build-scripts/format-code to handle .py files then?

Not yet, but it could :). Although it is specifically for C++.

formatting yourself is as simple as install black through pip and running black $FILENAME

[zeha]

From my experience with a rather large project, I'd like to offer two unsolicited pieces of advice:

1. use ruff format - it tends to be faster (but has subtle formatting differences), and maybe you want to use ruff lint too later
2. use line-length 120 - modern python needs quite some vertical (white)space

a pyproject.toml config would be:

[tool.ruff]
line-length = 120

[pieterlexis]

Updated the PR to use ruff (which is indeed fast)