Data management and updating

Tracker for updating and getting data
Datamanager to serialize/deserialize
Main for initialization
Config for config

main.py

@@ -0,0 +1,30 @@
+from core.tracker import Tracker
+from storage.data_manager import DataManager
+from config import REGISTERED_USERS, MENU_ITEMS
+
+
+def main():
+    data_manager = DataManager("data")
+    tracker = Tracker(data_manager)
+
+    if not tracker.users:
+        from core.user import User
+        from core.item import Item
+
+        for user_id, name in REGISTERED_USERS.items():
+            tracker.users[user_id] = User(user_id, name)
+        data_manager.save_users(tracker.users)
+
+        for item_id, item_data in MENU_ITEMS.items():
+            tracker.items[item_id] = Item(
+                item_id, item_data["name"], item_data["price"]
+            )
+        data_manager.save_items(tracker.items)
+
+    print("DebtTracker initialized successfully!")
+    print(f"Users: {[u.name for u in tracker.users.values()]}")
+    print(f"Menu items: {[m.name for m in tracker.items.values()]}")
+
+
+if __name__ == "__main__":
+    main()