Dev bipartite graphs

[vishal-ph]

Description

• Add a tutorial notebook solving MVC with OpenQAOA

Type of change

Please delete options that are not relevant.

• New tutorial notebook

[codecov]

Codecov Report

Merging #104 (55b228f) into dev (431b683) will decrease coverage by 5.45%.
The diff coverage is 67.44%.

@@            Coverage Diff             @@
##              dev     #104      +/-   ##
==========================================
- Coverage   92.84%   87.38%   -5.46%     
==========================================
  Files          60       67       +7     
  Lines        7629     8904    +1275     
==========================================
+ Hits         7083     7781     +698     
- Misses        546     1123     +577     

Impacted Files	Coverage Δ
openqaoa/backends/qpus/qaoa_qiskit_qpu.py	21.68% <0.00%> (-0.27%)	⬇️
openqaoa/backends/simulators/qaoa_qiskit_sim.py	100.00% <ø> (ø)
openqaoa/qaoa_parameters/gatemap.py	88.02% <0.00%> (ø)
openqaoa/qaoa_parameters/operators.py	100.00% <ø> (ø)
openqaoa/workflows/optimizer.py	83.15% <ø> (-0.18%)	⬇️
setup.py	100.00% <ø> (ø)
tests/test_results.py	100.00% <ø> (ø)
tests/test_qpu_braket.py	10.82% <10.82%> (ø)
openqaoa/backends/qpus/qaoa_braket_qpu.py	22.09% <22.09%> (ø)
openqaoa/devices.py	48.57% <23.33%> (-46.50%)	⬇️
... and 48 more

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[Q-lds]

A few ideas to improve this PR:

• The notebook contains a lot of functions: shouldn't these functions be part of a regular .py file? Maybe some utilities file in the problem folder?
• We need tests for the new functions
• The JSON inputs should be moved somewhere else: perhaps in a new folder, examples/problem_input?
• The notebook itself should be moved to the example section. It could also be expanded a bit more