refactor Paraview code & parcel-model animations

[olastrz]

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 86.55%. Comparing base (64877ed) to head (125edbe). :warning: Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1725      +/-   ##
==========================================
+ Coverage   86.50%   86.55%   +0.04%     
==========================================
  Files         412      413       +1     
  Lines       10372    10455      +83     
==========================================
+ Hits         8972     9049      +77     
- Misses       1400     1406       +6     

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[slayoo]

@olastrz, kudos for the new visualisation!

Here is some feedback on the code:

• [x] since we are creating a new examples subfolder, let's move the new notebook there and add badges pointing to it to the __init__.py file
• [x] let's add an entry in the examples/docs/pysdm_examples_landing.md list of examples
• [x] instead of the 4 "pylint disable:" comments, let's fix the issues reported by pylint (disable=protected-access seems to be the only inevitable one)
• [x] since we are adding a new module to PySDM - the exporter, we need to cover it with a unit test
• [x] the change of "mass_of_dry_air=44 * si.kg" to "mass_of_dry_air=66666 * si.kg," in the simulation.py files potentially influences other code in the Pyrcel example - if this setting is crucial, let's make it alterable from outside while keeping the original value as default
• [x] there is a leftover print statement and c:\Users\strza\Desktop\PySDM\examples\PySDM_examples\Pyrcel\../../../PySDM/exporters/ output present in the commited notebook
• [x] the paraview_simulation.py file name seems misleading as it does not perform any simulation
• [x] the except subprocess.CalledProcessError as e: print("Error during script execution:") print("STDERR:", e.stderr) print("STDOUT:", e.stdout) block seems unneeded as without the except statement, the same would be printed anyhow?
• [x] the sys.path.append(exporters_path) logic is not needed - we can do from PySDM.exporters import ...
• [x] for the camera position settings, let's do max 4 significant digits (now we have figures like 1548.945972263949)
• [x] let's remove any remaining code comments (and wherever these are needed to understand the code, let's include the relevant information in function or variable names)

[slayoo]

kudos @olastrz !