docs: move project banner to the top of the README

Author: mtitov

README.md

@@ -1,11 +1,11 @@
+![logo](https://raw.githubusercontent.com/BNL-PESO-Hub/tutorial-sdk/main/docs/assets/images/tutorial-sdk-banner-modern.png)
+
 # Tutorial SDK
 [![PyPI version](https://img.shields.io/pypi/v/tutorial-sdk.svg?color=blue)](https://pypi.org/project/tutorial-sdk/)
 [![Python versions](https://img.shields.io/pypi/pyversions/tutorial-sdk.svg)](https://pypi.org/project/tutorial-sdk/)
 [![License](https://img.shields.io/badge/license-Apache--2.0-green.svg)](LICENSE)
 [![Docs](https://img.shields.io/badge/docs-MkDocs-blue)](docs/index.md)
 
-![logo](https://raw.githubusercontent.com/BNL-PESO-Hub/tutorial-sdk/main/docs/assets/images/tutorial-sdk-banner-modern.png)
-
 A **declarative, reproducible tutorial packaging system** and command-line tool that bridges the gap between technical content and stable containerized runtimes.
 
 > 💡 **Focus on teaching. We'll handle the runtime.**