Since DEs like KDE Plasma 6, GNOME and COSMIC are not designed to be X11-exclusive, putting them under `services.xserver` is misleading. In particular, GNOME defaults to Wayland these days and X11 support is going to be dropped in near future.
Let’s follow Plasma and move GNOME NixOS options out of `xserver` attribute.
This patch does not include any changes to X11 support itself.
Signed-off-by: John Titor <50095635+JohnRTitor@users.noreply.github.com>
