Improve step-by-step creation of Sequence in notebooks

[a-corni]

According to many beginner users, it seems that Pulser fails at being a nice introduction to Analog Quantum Computing due to the complexity of its notebooks. Most of our notebooks being to showcase all the subtleties of Pulser, I think this is understandable.

I here introduce textbook notebooks to explain the core concepts of Pulser usic basic Sequences, starting from Analog and Rydberg channels and step-by-step introducing the Raman channels:

• A X gate without interaction, that serves as the "Hello World", introducing all the concepts of Pulser's programmation and the mathematical formalism, and redirecting to all the notebooks where things are further explained.
• A X gate with interaction, that introduces the Rydberg Blockade and the Rydberg Blockade Radius (btw ⚠️ is it really \Omega_max that we care about for the Rydberg Blockade Radius ? I think this might be true for a square pulse, but I am not so sure for a BlackManWaveform).
• Local X gate to prepare states and complete the study of the Rydberg Blockade phenomenon (explains Local channels and DMM channels).
• Combining Raman and Rydberg channels with Local addressability to perform CZ gate (CCZ gate becomes a refinement, new CZ gate will have its place in Digital Applications).
• Making a Rabi experiment to introduce Parametrized Sequences (I keep the current page for Parametrized Objects) and redirect to noisy simulations.
• Executing an X gate without interaction on a QPU (or do we want this to be the anti-ferromagnetic use-case ?)

[review-notebook-app]

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