feat(backend): Hinzufügen von Match3-Modellen zur Indexdatei

- Import der neuen Modelle für das Match3-Minispiel, einschließlich Kampagnen, Levels, Tile-Typen und Benutzerfortschritt.
- Aktualisierung der Exportstruktur, um die neuen Modelle zu integrieren und die Übersichtlichkeit zu verbessern.

backend/models/index.js

@@ -86,6 +86,15 @@ import Credit from './falukant/data/credit.js';
 import DebtorsPrism from './falukant/data/debtors_prism.js';
 import HealthActivity from './falukant/log/health_activity.js';
 
+// — Match3 Minigame —
+import Match3Campaign from './match3/campaign.js';
+import Match3Level from './match3/level.js';
+import Match3TileType from './match3/tileType.js';
+import Match3LevelTileType from './match3/levelTileType.js';
+import Match3Objective from './match3/objective.js';
+import Match3UserProgress from './match3/userProgress.js';
+import Match3UserLevelProgress from './match3/userLevelProgress.js';
+
 // — Politische Ämter (Politics) —
 import PoliticalOfficeType from './falukant/type/political_office_type.js';
 import PoliticalOfficeRequirement from './falukant/predefine/political_office_prerequisite.js';
@@ -212,6 +221,15 @@ const models = {
   ChatRight,
   ChatUserRight,
   RoomType,
+  
+  // Match3 Minigame
+  Match3Campaign,
+  Match3Level,
+  Match3TileType,
+  Match3LevelTileType,
+  Match3Objective,
+  Match3UserProgress,
+  Match3UserLevelProgress,
 };
 
 export default models;