Draft: Resolve "pypi release and extended documentation"

Closes #23

added enhancement label

added 10 commits

• 1365874a - updated version, we might declare the release as a new version
• ce5d3c91 - worked on preparation for release on pypi
• 312555fe - removed ignored line from build and added build directory to gitignore
• 72299ea5 - minor update of README.
• 923b9370 - added citation
• 63270a69 - added cff file
• 4c6d9852 - updated juser entry in citation file
• fee18e0f - added prefered citation
• 9433505f - refactor of contributor classes.
• 656b6842 - Merge branch '23-pypi-release-and-extended-documentation-buildsystem' into...

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