feat: move to single-user config

modules/features/_noctalia-config.nix

@@ -1,4 +1,5 @@
 {
+  homeDirectory,
   lib,
   terminalPackage,
 }:
@@ -102,7 +103,7 @@
     screenOverrides = [ ];
   };
   general = {
-    avatarImage = "/home/kiri/.face";
+    avatarImage = "${homeDirectory}/.face";
     dimmerOpacity = 0;
     showScreenCorners = false;
     forceBlackScreenCorners = false;
@@ -213,7 +214,7 @@
   wallpaper = {
     enabled = true;
     overviewEnabled = false;
-    directory = "/home/kiri/media/images/wallpapers";
+    directory = "${homeDirectory}/media/images/wallpapers";
     monitorDirectories = [ ];
     enableMultiMonitorDirectories = false;
     showHiddenFiles = false;