Add citation.cff

[liamhuber]

@JNmpi, as @srmnitc has indicated a time-sensitive wish to cite this software (#782), I'd like to use Zenodo to create a DOI for the repository. I recently did this for bagofholding and it went very smoothly. I believe the initial Zenodo process will read this file, and I can close the loop by coming back and updating this file with the Zenodo-created DOI reference.

@samwaseda, you're the second human contributor to this repo -- would you like to be added to the author list here?

[github-actions]

👈 Launch a binder notebook on branch pyiron/pyiron_workflow/citation

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.46%. Comparing base (70059ca) to head (945de36).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #784   +/-   ##
=======================================
  Coverage   93.46%   93.46%           
=======================================
  Files          38       38           
  Lines        3873     3873           
=======================================
  Hits         3620     3620           
  Misses        253      253           

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[samwaseda]

@samwaseda, you're the second human contributor to this repo -- would you like to be added to the author list here?

hmmm no not really. I didn't make any substantial contribution