increase min cutoff for visualize2d/3d to 50

[ziofil]

Visualize2d/3d can show a wrong image when plotting non-DM wigner functions, such as the parity operator. This PR guarantees a minimum fock cutoff of 50 for the wigner plot, which solves most of these issues.

Before:

After:

Also 3d (after):

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.22%. Comparing base (4ac64c1) to head (d38ee64).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #463      +/-   ##
===========================================
+ Coverage    89.21%   89.22%   +0.01%     
===========================================
  Files          102      102              
  Lines         7194     7201       +7     
===========================================
+ Hits          6418     6425       +7     
  Misses         776      776              

Files	Coverage Δ
mrmustard/lab_dev/circuit_components.py	98.38% <100.00%> (+0.02%)	⬆️
mrmustard/lab_dev/states/base.py	96.93% <100.00%> (+0.01%)	⬆️

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[timmysilv]

i can't speak to whether there are cases where this minimum doesn't really make sense, but I am guessing you can - do any instances come to mind where we don't want this minimum, and if so, can we use the new kwarg in those cases? otherwise, this looks good to me

[ziofil]

i can't speak to whether there are cases where this minimum doesn't really make sense, but I am guessing you can - do any instances come to mind where we don't want this minimum, and if so, can we use the new kwarg in those cases? otherwise, this looks good to me

We'll replace the discretized method with calling the new ansatz as soon as it's available. In the meantime this is good enough to not incur in odd results like you'd have with too small cutoff.