docs: moving three tutorials from Pruna Pro to Pruna

[minettekaum]

Description

Moving tutorials from Pruna Pro to Pruna.

Moved tutorials:

• computer_vision.ipynb (x_fast compilation for CV models)
• recovery.ipynb (PERP recovery after quantization)
• ring_attn.ipynb (multi-GPU Flux distribution with ring attention)
• Updated docs/tutorials/index.rst to surface them on the Tutorials landing page.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Yes, it has been checked that the tutorials builds correctly

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

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[davidberenstein1957]

one remark, could yopu double check the google colab urls?

[davidberenstein1957]

as mentioned in the other PR, perhaps we can automatically generate this file to avoid missing tutorials? Anyhow, it might be better to just focus on is during a bigger documentation rewrite.