feat(PDFGenerator): add team lineup PDF generation and localization updates

- Implemented a new feature to generate a PDF for team lineups, including detailed information such as club name, team name, league, season, gender, and age group.
- Enhanced localization files across multiple languages to include new terms related to the PDF generation feature, ensuring a consistent user experience.
- Updated the TeamManagementView to include a button for downloading the lineup as a PDF, improving accessibility for users.

backend/migrations/20260402_add_team_gender_team_age_group_to_club_team.sql

@@ -0,0 +1,10 @@
+-- club_team: Felder wie backend/models/ClubTeam.js (teamGender, teamAgeGroup)
+-- Fehlen in der DB -> SequelizeDatabaseError ER_BAD_FIELD_ERROR bei getClubTeams.
+
+ALTER TABLE `club_team`
+  ADD COLUMN `team_gender` ENUM('open', 'female') NOT NULL DEFAULT 'open'
+    COMMENT 'Geschlecht Team (offen / nur weiblich)'
+    AFTER `my_tischtennis_team_id`,
+  ADD COLUMN `team_age_group` ENUM('adult', 'J19', 'J17', 'J15', 'J13', 'J11') NOT NULL DEFAULT 'adult'
+    COMMENT 'Altersklasse Mannschaft'
+    AFTER `team_gender`;