feat(desktop/firefox): add synced profile support and move desktop config

systems/x86_64-linux/nemesis/default.nix

@@ -1,9 +1,8 @@
 {
-  lib,
-  ...
-}:
-{
-  imports = lib.singleton ../common.nix;
+  imports = [
+    ../common.nix
+    ../desktop.nix
+  ];
 
   system = {
     hostname = "nemesis";
@@ -20,27 +19,6 @@
     gpu = "nvidia";
   };
 
-  desktop = {
-    windowManager = "hyprland";
-    browser = "firefox";
-    terminal = "ghostty";
-    lockscreen = "hyprlock";
-    notification-daemon = "mako";
-    launcher = "fuzzel";
-    status-bar = "waybar";
-    media-player = "vlc";
-    mainMonitor = {
-      id = "desc:OOO AN-270W04K";
-      scale = "2";
-      resolution = "3840x2160";
-      refresh-rate = "60";
-    };
-    enableSpotifyd = true;
-    enableSteam = true;
-    enableVR = true;
-    enableSunshine = true;
-  };
-
   services = {
     tor = {
       enable = true;