Apply repo-review suggestions?

[DimitriPapadopoulos]

Apply Scientific Python Repo-Review suggestions:
https://learn.scientific-python.org/development/guides/repo-review/?repo=cea-sec%2Fmiasm&branch=master

Among other, this would involve moving from setup.py to pyproject.toml — probably with the maturin build-system. You would also use the ruff linter (and perhaps formatter) with UP and B rules (some of them are really useful). And most importantly, let go Python 2 compatibility, which you may not want — or pick issues relevant to Python 2.