feat(TrainingGroup): add excludeFromQuickDiaryCreate feature and update related logic

- Introduced a new boolean field `excludeFromQuickDiaryCreate` in the TrainingGroup model to control group visibility in quick diary creation.
- Updated the `updateTrainingGroup` service method to handle the new field, allowing for dynamic updates based on user input.
- Enhanced the TrainingTimesTab component to include a checkbox for excluding groups from quick diary creation, improving user interaction.
- Updated localization files to include new strings related to the exclude feature, ensuring clarity in multiple languages.
- Refactored logic in DiaryView and mobile app to consider the new exclusion criteria when suggesting training slots.

backend/models/TrainingGroup.js

@@ -38,7 +38,13 @@ const TrainingGroup = sequelize.define('TrainingGroup', {
         allowNull: false,
         defaultValue: 0,
         comment: 'Order for displaying groups'
-    }
+    },
+    excludeFromQuickDiaryCreate: {
+        type: DataTypes.BOOLEAN,
+        allowNull: false,
+        defaultValue: false,
+        comment: 'If true, group is skipped when suggesting/creating diary dates via quick-create'
+    },
 }, {
     tableName: 'training_group',
     underscored: true,