- Implemented setParticipantGaveUp and setExternalParticipantGaveUp methods in tournamentController to handle participant resignation.
- Updated ExternalTournamentParticipant and TournamentMember models to include a gaveUp field for tracking resignation status.
- Enhanced tournamentRoutes to include new endpoints for updating gave-up status.
- Modified TournamentGroupsTab and TournamentParticipantsTab components to display and manage gave-up status visually.
- Added localization strings for "gave up" and related hints in German.
- Updated TournamentResultsTab to reflect gave-up status in match results.