BDDs and designs in T246125
Tech pointers / breakdown discussion in T246125#6303946 (and above)
Usage on summary pages is to be done in a followup.
During the breakdown we discussed how to actually load modules like this, and https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Wikibase/+/607539/5 is a rough and relevant example (although it uses addModuleStyles, rather than addModule)