Maintenance Tutorials(MCTWrapper) (#1639)

* Minimized parameters for a simple demo.  
* Refactored text and source code.
* Set versions at installing below libraries, same of #1632
    * tensorflow==2.15
    * onnx==1.17.0
* Add how to downgrade python3.12 to python3.11 for tensorflow in Colab environment, same of #1632

Author: ueno-hiroshi002