feat: update x13s to linux-6.13-rc1 and use nixos-unstable

nix/home-manager/configuration/graphical-fullblown.nix

@@ -116,7 +116,7 @@ in
 
       # gnome.gnome-keyring
       gcr
-      gnome.seahorse
+      seahorse
 
       # Language Support
       hunspellDicts.en-us
@@ -171,7 +171,7 @@ in
       # TODO(remve or use): pkgsUnstable.helix
 
       # Image/Graphic/Design Tools
-      gnome.eog
+      eog
       # gimp
       # imagemagick
       # exiv2
@@ -193,7 +193,7 @@ in
       # cdrtools
 
       # Document Processing and Management
-      gnome.nautilus
+      nautilus
       pcmanfm
       # mendeley
       evince