docs: Add some more metadata to man pages
docs: Add some more metadata to man pages

kari-lentz/alpha-pango,danny-ku/pango,Distrotech/pango,danny-ku/pango,danny-ku/pango,kari-lentz/alpha-pango,Distrotech/pango,kari-lentz/alpha-pango,Distrotech/pango,kari-lentz/alpha-pango