add citation

[avallecam]

This could be a cff file

And compare with this guidelines https://carpentries.github.io/lesson-development-training/collaborating-newcomers.html#readme

[avallecam]

should this refer to episode contributors or a global Epiverse-TRACE Education Team (e.g. https://rstudio-education.github.io/learner-personas/ and separate https://education.rstudio.com/author/)

[avallecam]

replicate how this is solved epiverse-trace/research-compendium#19

[avallecam]

use template file in https://github.com/carpentries/workbench-template-rmd/blob/main/CITATION.cff