Data management and updating

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

config.py

@@ -0,0 +1,10 @@
+ADMIN_PASSWORD = "admin123"
+
+# Use UUIDs or simple string IDs
+REGISTERED_USERS = {"user_1": "Alice", "user_2": "Bob", "user_3": "Charlie"}
+
+MENU_ITEMS = {
+    "item_1": {"name": "Coffee", "price": 2.50},
+    "item_2": {"name": "Sandwich", "price": 6.00},
+    "item_3": {"name": "Drink", "price": 1.50},
+}