Tutorials organization discussion

Open this topic to discuss about the organization of the tutorials.

For now I propose to sort them by "difficulty" level:
1. Basic: like hello world stuff: https://kornia-tutorials.readthedocs.io/en/latest/hello_world_tutorial.html, short ones to use some functionality: https://kornia-tutorials.readthedocs.io/en/latest/color_conversions.html
2. Intermediate: https://colab.research.google.com/github/kornia/tutorials/blob/master/source/descriptors_matching.ipynb
3. Advanced: more developed: https://kornia-tutorials.readthedocs.io/en/latest/homography.html
4. Data augmentation: specific one to show about data augmentation @shijianjian

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Another way to organize might by topic. Let's brainstorm a bit /cc @shijianjian @ducha-aiki @lferraz

Start by reviewing the linked hello_world_tutorial.html, color_conversions.html, descriptors_matching.ipynb, and homography.html tutorials. The issue is an open-ended discussion of organizing tutorials by difficulty or topic, and it does not define a file, implementation scope, or completion criteria.

Written by the indexing model from the issue text.