add jupyter notebook demonstraing the use of CyclicalTransformer

[solegalli]

Add a jupyter notebook demonstrating the full functionality of the Cyclical Transformer to our example gallery located here:
https://github.com/feature-engine/feature-engine-examples/tree/main/creation

The notebook should feature a dataset as real as possible, suitable options are those from the UCI Machine Learning repository,

The data can't be uploaded to the repo, so we need to indicate in the notebook how to obtain it.

We need to link the notebook to the CyclicalTransformer rst afterwards.

[solegalli]

@hectorpatino

[hectorpatino]

I have problems with rst files, but I will try it!

[solegalli]

Cool thanks! If you add the notebook, then I can tell you how to add a link to the rst, it is really easy :)