Update Helium to 0.14.6.1

Rename the noctalia module to noctalia-shell and update references in
the home configuration.

modules/home/noctalia/settings/default.nix

@@ -1,25 +0,0 @@
-_: {
-  imports = [
-    ./bar
-    ./notifications
-    ./app-launcher.nix
-    ./audio.nix
-    ./brightness.nix
-    ./calendar.nix
-    ./color-schemes.nix
-    ./control-center.nix
-    ./desktop-widgets.nix
-    ./dock.nix
-    ./general.nix
-    ./hooks.nix
-    ./location.nix
-    ./network.nix
-    ./night-light.nix
-    ./osd.nix
-    ./session-menu.nix
-    ./system-monitor.nix
-    ./templates.nix
-    ./ui.nix
-    ./wallpapers.nix
-  ];
-}