feat(TournamentStats): refine internal tournament scoring and enhance UI features

- Updated the scoring logic for internal tournaments to reflect percentage-based placements, improving clarity and fairness in rankings.
- Refactored the `groupPointsFromRankings` function to `groupPercentFromRankings` for better readability and accuracy in calculations.
- Enhanced the InternalTournamentStats component with a new PDF export feature and improved dialog positioning for better user experience.
- Updated localization strings across multiple languages to align with the new scoring system and UI enhancements, ensuring better accessibility and understanding for users.

backend/controllers/tournamentController.js

@@ -59,7 +59,7 @@ export const getTournaments = async (req, res) => {
     }
 };
 
-/** Ranglisten interne Einzel-Turniere (Gruppen- + K.-o.-Punkte) */
+/** Ranglisten interne Einzel-Turniere (Gruppen-% + K.-o.-Bonus wie im Service) */
 export const getInternalTournamentStats = async (req, res) => {
     const { authcode: token } = req.headers;
     const { clubId } = req.params;