feat(referral): add referral system with withdrawals

tgbot/database/__init__.py

@@ -6,7 +6,29 @@ from .db_purchases import PurchaseModel, Purchasesx
 from .db_refill import RefillModel, Refillx
 from .db_settings import SettingsModel, Settingsx
 from .db_users import UserModel, UsersRepository, Userx
-from .entities import Category, Item, Payments, Position, Purchase, Refill, Settings, User
+
+from .db_referral import (
+    ReferralModel,
+    ReferralTransactionModel,
+    ReferralWithdrawalModel,
+    Referralx,
+    ReferralTransactionx,
+    ReferralWithdrawalx,
+)
+
+from .entities import (
+    Category,
+    Item,
+    Payments,
+    Position,
+    Purchase,
+    Refill,
+    Settings,
+    User,
+    Referral,
+    ReferralTransaction,
+    ReferralWithdrawal,
+)
 
 ModelCategory = Category
 ModelItem = Item
@@ -18,3 +40,7 @@ ModelSettings = Settings
 ModelUser = User
 ModelUsers = User
 SettingsRepository = Settingsx
+
+ModelReferral = Referral
+ModelReferralTransaction = ReferralTransaction
+ModelReferralWithdrawal = ReferralWithdrawal