Bring serviceData and makeBadge schemas into full alignment

Since #2863 is done, the schema translation being performed in `coalesceBadge()` is no longer useful. If we bring the `makeBadge()` schema into full alignment with `serviceData`, we won't need to translate schema in `coalesceBadge()`.

The function would still exist, but it would only coalesce, not _also_ translate schema.

This is dependent on resolving named icons within `makeBadge()` and making simple-icons an optional dependency.

This work is related to #3369, though separable.

Start by reading makeBadge() and coalesceBadge(), then compare the makeBadge() schema with serviceData and review the work described in #2863 and #3369. Done means named icons are resolved within makeBadge(), simple-icons is optional, and coalesceBadge() only coalesces without translating the schema.

Written by the indexing model from the issue text.