This imports the existing app lists from:
 - https://gitlab.gnome.org/GNOME/gnome-software/-/blob/main/data/assets/org.gnome.Software.Curated.xml
 - https://gitlab.gnome.org/GNOME/gnome-software/-/blob/main/data/assets/org.gnome.Software.Featured.xml

See GNOME/gnome-software#1982 (comment 1633421)



Signed-off-by: Philip Withnall <pwithnall@endlessos.org>