QAOA-CV with bosonic qubits

[gcattan]

Implement QAOA-CV with bosonic qubits

1. Jupyter notebook with strawberryfields (bosonic qubits)
   https://nbviewer.org/github/Lucaman99/Quantum-Computing/blob/master/xanadu/cvqaoa.ipynb#3

2. Simulation of bosonic qubits on qiskit:
   https://medium.com/qiskit/introducing-bosonic-qiskit-a-package-for-simulating-bosonic-and-hybrid-qubit-bosonic-circuits-1e1e528287bb