Add Wikimedia Commons images to terms missing "depicted by"

[lubianat]

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• As depicted_by annotations pointing to SwissBioPics #1263

we can add images from Wikimedia Commons to illustrate the concepts for different cell types.

These can easily be pulled from Wikidata via SPARQL queries, for example:

Do we want those images on the Cell Ontology? They are not standardized, but they could make it a bit more rich for reusers when navigating OLS.

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