chore: add python banner (#70)

* chore: add python banner

* Add logo image to README

Add logo image to README for visual enhancement

Author: twangodev

.github/assets/python.png

@@ -1,3 +1,5 @@
+![python.png](.github/assets/python.png)
+
 # Fish Audio Python SDK
 
 [![PyPI version](https://img.shields.io/pypi/v/fish-audio-sdk.svg)](https://badge.fury.io/py/fish-audio-sdk)
@@ -255,4 +257,4 @@ except FishAudioError as e:
 
 ## License
 
-This project is licensed under the Apache-2.0 License - see the [LICENSE](LICENSE) file for details.
+This project is licensed under the Apache-2.0 License - see the [LICENSE](LICENSE) file for details.