We will want to split out differences on the `Z2Kx`s and group them together, like Wikibase does.
Technically, we WikiLambda needs to implement a subclass of SlotDiffRenderer
Some examples from Wikidata of structure diffs, for inspiration:
* [[https://www.wikidata.org/w/index.php?title=Q42&diff=1380514121&oldid=1380499865 | The top-level label being changed in Chinese (zh)]]
* [[https://www.wikidata.org/w/index.php?title=Q42&diff=1344210497&oldid=1344210383 | A first alias being added in Turkish (tr)]]
* [[https://www.wikidata.org/w/index.php?title=Q42&diff=1746564369&oldid=1746564363 | An alias being removed in French (fr)]]
* [[https://www.wikidata.org/w/index.php?title=Q42&diff=1746567299&oldid=1746566931 | A new property ("name in native language") being set]]
* [[https://www.wikidata.org/w/index.php?title=Q42&diff=1331599252&oldid=1331599126 | An existing property's value being switched from British English to international English]]