feat: Implement marketplace and purchases services

- Added MarketplaceService for searching usernames, numbers, and gifts.
- Introduced PurchasesService for purchasing stars and premium subscriptions.
- Created WalletService for wallet operations including balance checks and top-ups.
- Developed transaction handling for TON and USDT transfers.
- Added models for payments, marketplace results, and wallet information.
- Implemented error handling for various operations including wallet and transaction errors.
- Established domain structure for purchases, marketplace, and wallet functionalities.

pyfragment/domains/giveaways/service.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from pyfragment.domains.base import BaseService
+from pyfragment.domains.giveaways.giveaway import giveaway_premium, giveaway_stars
+from pyfragment.models.enums import PaymentMethod
+from pyfragment.models.giveaways import PremiumGiveawayResult, StarsGiveawayResult
+
+if TYPE_CHECKING:
+    pass
+
+
+class GiveawaysService(BaseService):
+    async def giveaway_stars(
+        self,
+        channel: str,
+        winners: int,
+        amount: int,
+        payment_method: PaymentMethod = "ton",
+    ) -> StarsGiveawayResult:
+        return await giveaway_stars(self._client, channel, winners, amount, payment_method=payment_method)
+
+    async def giveaway_premium(
+        self,
+        channel: str,
+        winners: int,
+        months: int = 3,
+        payment_method: PaymentMethod = "ton",
+    ) -> PremiumGiveawayResult:
+        return await giveaway_premium(self._client, channel, winners, months, payment_method=payment_method)