docs: add examples to various API methods for better clarity

docs/client/ads/recharge-ads.md

@@ -21,3 +21,10 @@ await client.recharge_ads(
 ## Return
 
 - `AdsRechargeResult(transaction_id, amount)`
+
+## Example
+
+```python
+result: AdsRechargeResult = await client.recharge_ads("@mychannel", amount=50)
+print(result.transaction_id)
+```

docs/client/ads/topup-ton.md

@@ -23,3 +23,10 @@ await client.topup_ton(
 ## Return
 
 - `AdsTopupResult(transaction_id, username, amount)`
+
+## Example
+
+```python
+result: AdsTopupResult = await client.topup_ton("@username", amount=10, show_sender=True)
+print(result.transaction_id)
+```