feat: routine to select contributors

To answer Elisa Nury feedback that the list of contributors might be too big to humanly read and select, so this new version implements a rudimentary search of a user token among the list of contributors fetched.

requested review from @Hugues.Cazeaux

assigned to @Cedric.Viaccoz

marked this merge request as draft

added 3 commits

• d001ed36...533b133c - 2 commits from branch main
• f1a69dec - Merge branch 'main' into 'CVI-Contributor-selections'

Compare with previous version

marked this merge request as ready

mentioned in commit 5577b576

merged