Add Configuration.strip_dev and strip dev info if set

[kalfa]

There is no easy way to just do the equivalent of python -m setuptools_scm --strip-dev via pyproject.toml

This adds a field strip_dev:bool to the Configuration dataclass which maps to

[tool.setuptools_scm]
strip_dev = true

and when true makes any version computed a non-dev version. the same of --strip-dev.

It seems that any other way is to fiddle with python code.

Having python code in large projects means either having the code repeated for each repo, or having to have a single package from which all the build setups needs to depends. This would be ok, but is largely prerible adding a description line to pyproject and avoid the hassle.

[kalfa]

exploring various schema configurations.

they don't seem to work for me, but I'd rather use those if they do