[PIMO] update notebooks

[jpcbertoldo]

📝 Description

Update pip install, correct some mistakes in the introductions, and add a README in the folder 700.

My own TODOs

• update 701e (intro, cite us, pip install) after [PIMO] compare to benchmark #2378 (comment)
• update readmes
• add function api in the basics

✨ Changes

Select what type of change your PR is:

• 🐞 Bug fix (non-breaking change which fixes an issue)
• 🔨 Refactor (non-breaking change which refactors the code base)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🔒 Security update

✅ Checklist

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• 📋 I have summarized my changes in the CHANGELOG and followed the guidelines for my type of change (skip for minor changes, documentation updates, and test enhancements).
• 📚 I have made the necessary updates to the documentation (if applicable).
• 🧪 I have written tests that support my changes and prove that my fix is effective or my feature works (if applicable).

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