Add Hezar tutorial notebook

[givkashi]

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[arxyzan]

Hello @givkashi thanks for the PR.
I just reviewed your notebook. IMO providing a notebook as a tutorial is not a good idea since a tutorial has multiple subsections itself. You can take a look at the docs to learn more.
I suggest that you'd better rewrite the quick tour notebook based on https://hezarai.github.io/hezar/get_started/quick_tour.html