Feature/158 design jupyter notebooks in the same style

[lyutov89]

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name: "Pull request"
about: Make changes in scikit-uplift

📑 Description of the Change

First step to prepare Tutorials for EDA simple, user-friendly and useful as PyTorch documentation.
As we discussed, I add adversarial validation.
Please give me your recommendations how to improve baseline (add viz or other metrics)

Verification Process

For adversarial validation I use following sources:

• Link1
• Link2

Release Notes

• Add adversarial validation

Additional info