Add qutip-qip tutorials to documentation on Read the docs

[nathanshammah]

Issue description

Add links for exisiting qutip-qip notebooks on the read the docs documentation at https://qutip-qip.readthedocs.io/en/stable/, similarly to what is done for Mitiq. Right now there is a tutorials section (see screenshot below)

but it only contains a link to qutip.org, as the tutorials appear only on the https://qutip.org/qutip-tutorials/ under the QIP section, see screenshot below.

Proposed Solution

The tricky part is that we don't want to duplicate the files, the source files should remain from qutip-tutorials, such as for the
"Decomposition of the Toffoli gate in terms of CNOT and single-qubit rotations" that is rendered from

https://nbviewer.org/urls/qutip.org/qutip-tutorials/tutorials-v4/quantum-circuits/qip-toffoli-cnot.ipynb

The tutorials should be kept also on the https://qutip.org/qutip-tutorials/#quantum-information-processing as they currently exist.

References

• https://qutip-qip.readthedocs.io/en/stable/
• https://qutip.org/qutip-tutorials/#quantum-information-processing
• https://github.com/qutip/qutip-tutorials

[Algh89110377]

Hi, It is my first time contributing to open-source problems. I like to tackle this one. Will you please add me?

[natestemen]

Hackers! This bounty has increased in value! What was worth $50 is now $100!

[miaortizma]

Hi, would git submodules be an acceptable solution?

[BoxiLi]

@rum1887 Could you comment here so that I can assign you?

[rum1887]

Hi, here's the pr for this issue #207

[BoxiLi]

@nathanshammah @natestemen This has been solved! Thank you @rum1887

[nathanshammah]

Congratulations @rum1887!