Added a CITATION.cff file.

I've added a CITATION.cff file. I'm not sure it's super useful to us.

requested review from @GAMELIN

added 1 commit

• 91f9de38 - Edit CITATION.cff

Compare with previous version

Edited using: https://citation-file-format.github.io/cff-initializer-javascript/#/

approved this merge request

mentioned in commit c0c58bbc

merged