tox was used as sort of a make target to run unit tests
and more in a python virtualenv. However, since we switched
everything to poetry it's no longer needed to let tox create
the python virtual environments. This commit moves the tox
targets into the Makefile and adapts the github workflow
files accordingly. In addition the scripts container based
tests were re-activated and fixed such that they succeed
again.
Python 3.13 is shipping in Fedora Linux for Fedora Linux 41, so we
should ensure kiwi is tested against it. The testing setup is
based on the latest development version of 3.13 as it is not
yet released.
Moving the linter and unit tests to github workflows and
out of the gitlab CI system has the advantage that pull
request from forked repos will run the tests. In the long
run I think we should move away completely from gitlab CI
and use github actions as this will reduce the number of
external services used in the kiwi project. This commit
starts with the most simple parts: unit and type tests,
doc rendering and code style
