Add more examples

[codecov-commenter]

Codecov Report

Merging #60 (2cb41d3) into master (e54790f) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #60   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            7         7           
  Lines          532       532           
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  Hits           532       532           

Flag	Coverage Δ
pytest	100.00% <ø> (ø)

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[arnaudon]

Just need to add leiden tests to increase cov back to 100 once leiden PR is merged/released

[d-schindler]

I used this branch to make a small change for the plotting: I discovered that we often have white regions on the diagonal of the NVI(t,t^\prime) heatmap when the NVI is 0 but actually it should be dark in our colour scheme, so I changed the "extend" of the contour plot to "min".

[arnaudon]

It's better to make new branch, but this is small, so it's fine

[arnaudon]

ah sorry, I thought this was leiden branch, it's fine here indeed! Feel free to improve stuff here as well!

[peach-lucien]

did we decide on whether we want to merge these examples into main? They are not quick to compute despite my best efforts to compressing them considerably. If so, we will want to add these examples into the docs.

[d-schindler]

I thought we wanted to pre-compute the examples, and provide the results as files that are then just read in the notebooks?