Add Example Notebook for Large Language Models

[mmschlk]

Create an example notebook that walks through loading, setting up, and explaining a large language model.

• The notebook should load a model from huggingface.
• then the model should be used on a rather simple language task, which maybe is not classification (tbd.)
• then the model/task should be turned into a game
• this game should be explained with shapiq
• first an exact computation could be used for a rather small example
• second a longer example could be explained with some approximation