parse cibuildwheel configuration

Nobody has claimed this yet.

Recentily I've found an useful package to build python on different OS/archs: [cibuildwheel](https://cibuildwheel.readthedocs.io/en/stable/).

It has [CIBW_BUILD, CIBW_SKIP](https://cibuildwheel.readthedocs.io/en/stable/options/#build-skip) configurations regarding python version used to build and test the package (locally and remotely).

Those configuration can be set as environment variables into github action or into pyproject.toml file.
E.g. as environment variable:
```
# Build python 3.10 3.11
CIBW_BUILD: cp310-* cp11-*
# Skip CPython 3.6 and CPython 3.7
CIBW_SKIP: cp36-* cp37-*
```

as pyproject.toml
```
# Build python 3.10 3.11
build= ["cp310-*", "cp11-*"]
# Skip CPython 3.6 and CPython 3.7
skip = ["cp36-*", "cp37-*"]
```

when using this package, it could be useful to add the extracted information to the final list.

Start by tracing how the project currently extracts supported Python versions from configuration, then read cibuildwheel's CIBW_BUILD and CIBW_SKIP documentation and its environment-variable and pyproject.toml forms. Done means the extracted cibuildwheel configuration is included in the final list for both supported input styles.

Written by the indexing model from the issue text.