Offer a build option to disable 'help'
It will be nice to have a build option to disable (building?) and installing the contents of the
help sub-directory, because, for example, Flatpaks don't need them. One can also just delete it after the build, but having a build flag makes their presence slightly more obvious.
(By the way, are those really end-user help? They look like developer documentation to me. In that case, they should probably be installed in
/usr/share/gtk-doc instead of