docs(python): Add a `Plotnine` example to the visualization docs (#21… #23

Job	Run time
check-wasm	7m 41s
check-features	12m 40s
integration-test (ubuntu-latest)	3m 3s
test (windows-latest)	10m 30s
test (ubuntu-latest)	4m 0s
integration-test (windows-latest)	8m 12s
	46m 6s

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