Many input sources (especially UF) may have the same Family Name and
Styles, for the sake of the project we need that list de-duplicated.

This got added and turned on by default upstream in superlinter but is
a super terrible idea. We use it as a hint to editors manually editing
files, but the linter can't tell the difference between our hand edited
files and autogenerated code like automake's cruft.

This complexity is kind of needed to allow projects to have custom
rules. Without it they don't have any access to the anything Fontship
initializes. They won't even be running with the same shell options as
Fontship itself, at least not on first pass.

This normalizes it so all the makefiles are on a level field.