b1dd6973df
This will allow C code in shell to avoid going though `g_object_get`, and in future GJS will also be able to take advantage giving a slender yet not unwelcome boost to perf in some animations (Semi relates to https://gitlab.gnome.org/GNOME/mutter/-/issues/3083) Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3351>