Suggestion: Change topic `setup.py` to `Packaging`

[cdubos-fr]

In my opinion, setup.py is to restrictive as topic name, and not relevant for Python beginner.

Also, To be able to include pyproject.toml specification (PEP-517, PEP-518, PEP-660), changing the topic name is usefull.

Instead, I suggest to use Packaging as topic.