feat(ClubTeam): add planned league name field and localization updates

- Introduced a new field for planned league name in the ClubTeam model, allowing for better team categorization.
- Updated create and update club team endpoints to handle the new planned league name field.
- Enhanced the PDF generation feature to include planned league name in the output.
- Improved localization files across multiple languages to incorporate new terms related to the planned league, ensuring a consistent user experience.
- Updated the TeamManagementView to display and edit the planned league name, enhancing user interaction.

backend/models/ClubTeam.js

@@ -63,6 +63,12 @@ const ClubTeam = sequelize.define('ClubTeam', {
         defaultValue: 'adult',
         field: 'team_age_group'
     },
+    plannedLeagueName: {
+        type: DataTypes.STRING(512),
+        allowNull: true,
+        field: 'planned_league_name',
+        comment: 'Geplante Spielklasse (manuell, optional)'
+    },
 }, {
     underscored: true,
     tableName: 'club_team',