feat: Add gift and number search functionality to FragmentClient

- Implemented `search_gifts` method for searching gifts in the Fragment marketplace.
- Implemented `search_numbers` method for searching anonymous Telegram numbers.
- Added new example scripts for searching gifts, numbers, and usernames.
- Updated HTML parsing logic to handle gift items and number listings.
- Added unit tests for the new search methods and updated existing tests for usernames and numbers.
- Removed obsolete test file for auction searches.

examples/search_numbers.py

@@ -0,0 +1,41 @@
+"""
+Example: search the Fragment marketplace for anonymous Telegram numbers.
+
+sort can be "price_desc", "price_asc", "listed", or "ending".
+filter can be "", "auction", "sale", or "sold".
+Use next_offset_id for pagination.
+"""
+
+import asyncio
+
+from pyfragment import FragmentClient, NumbersResult
+
+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",
+}
+
+QUERY = "888"  # search term — or omit for all
+SORT = "price_asc"  # "price_desc", "price_asc", "listed", "ending" — or omit
+FILTER = ""  # "", "auction", "sale", "sold" — or omit
+
+
+async def main() -> None:
+    async with FragmentClient(seed=SEED, api_key=API_KEY, cookies=COOKIES) as client:
+        result: NumbersResult = await client.search_numbers(QUERY, sort=SORT, filter=FILTER)
+
+        print(f"Found {len(result.items)} result(s):")
+        for item in result.items:
+            price = f"{item['price']} TON" if item["price"] else "n/a"
+            print(f"  {item['name']:20s}  {item['status'] or '':15s}  {price:10s}  {item['date'] or '—'}")
+
+        if result.next_offset_id:
+            print(f"\nMore results available — next page offset: {result.next_offset_id}")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())