Login and UKI updates (#1860)

* Change DM to SDDM

* Move to custom named UKI

* Skip creation on Mac

* Add entry to make sure VSCode uses gnome keyring

* Fix order for UKI generation

* Limine only

* BTRFS only

install/omarchy-base.packages

@@ -56,6 +56,7 @@ kvantum-qt5
 lazydocker
 lazygit
 less
+libsecret
 libyaml
 libqalculate
 libreoffice
@@ -92,6 +93,7 @@ python-terminaltexteffects
 qt5-wayland
 ripgrep
 satty
+sddm
 signal-desktop
 slurp
 spotify