Refactor examples: reorganize and update scripts for managing Telegram services

- Removed outdated example scripts for managing anonymous numbers, making raw API calls, fetching wallet info, and various giveaways.
- Introduced new scripts for searching gifts, numbers, and usernames in the Fragment marketplace.
- Added examples for recharging Telegram Ads accounts and managing user balances with TON.
- Updated example scripts to improve clarity and maintainability, ensuring they align with the latest API changes.

examples/purchase/send_premium.py

@@ -0,0 +1,46 @@
+"""
+Example: purchase Telegram Premium for a user.
+
+Supported durations: 3, 6, or 12 months.
+Set show_sender=False to send anonymously.
+"""
+
+import asyncio
+
+from pyfragment import ConfigurationError, FragmentClient, UserNotFoundError
+
+SEED = "word1 word2 ... word24"
+API_KEY = "YOUR_TONAPI_KEY"
+COOKIES = {
+    "stel_ssid": "YOUR_STEL_SSID",
+    "stel_dt": "YOUR_STEL_DT",
+    "stel_token": "YOUR_STEL_TOKEN",
+    "stel_ton_token": "YOUR_STEL_TON_TOKEN",
+}
+
+USERNAME = "@username"
+MONTHS = 3  # 3, 6 or 12
+
+
+async def main() -> None:
+    async with FragmentClient(seed=SEED, api_key=API_KEY, cookies=COOKIES) as client:
+        try:
+            result = await client.purchase_premium(
+                USERNAME, months=MONTHS, show_sender=True
+            )
+        except UserNotFoundError:
+            print(
+                f"User {USERNAME} was not found on fragment.com — check the username and try again."
+            )
+            return
+        except ConfigurationError as e:
+            print(f"Invalid argument: {e}")
+            return
+
+    print(
+        f"{result.amount} months of Premium successfully sent to {result.username} | tx: {result.transaction_id}"
+    )
+
+
+if __name__ == "__main__":
+    asyncio.run(main())