new 2D advection diffusion example

[Kojec1]

No description provided.

[slayoo]

TODO:

• share simulation setting between Trixi.jl and PyMPDATA (e.g., through a common JSON file created in the notebook)
• save Julia simulation output to a file
• compare simulation output
• add Colab/Mybinder badges to the notebook header cell (as in other example notebooks in the repo)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.02%. Comparing base (efc4440) to head (76532e5).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #427   +/-   ##
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  Coverage   92.02%   92.02%           
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  Files          30       30           
  Lines        1468     1468           
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  Hits         1351     1351           
  Misses        117      117           

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[slayoo]

@Kojec1 @pawelmagnu the matplotlib version issue is now fixed in the main branch, so I've just rebased this PR's branch accordingly

[pawelmagnu]

@slayoo examples on windows still time out after 3 re-run, could you help with that?

[slayoo]

@slayoo examples on windows still time out after 3 re-run, could you help with that?

let's see if these will help: #452, #451

[slayoo]

closing & reopening to see if build against current main (with #452 merged) works