[FEATURE] Add initial codeowners file for repo on tool basis

Added initial version of CODEOWNERS file for aircraft-design repository

added typefeature label

requested review from @kristina.mazur and @Florian.Schueltke

assigned to @ChrisRuw

Thanks for your work :) I discussed this with @Florian.Schueltke yesterday that we use the universities as codeowners. I will accept this and adapt it later when I finished setting up the groups

approved this merge request

mentioned in commit fb2fecb1

merged