feat: Enable system flake additions from external files

inventory.nix

@@ -10,18 +10,17 @@
       # Enable specific users for this device index
       "1" = { extraUsers = [ "hdh20267" ]; };
       "2" = { extraUsers = [ "hdh20267" ]; };
+      
+      # Example of using an external flake for system configuration:
+      # "2" = { flakeUrl = "github:user/system-flake"; };
     };
   };
 
   # Desktop Configuration
   # Base specs: NVMe drive, 16G Swap
-  nix-desktop = {
-    count = 1;
-  };
+  nix-desktop.count = 1;
 
   # Surface Tablet Configuration (Kiosk Mode)
   # Base specs: eMMC drive, 8G Swap
-  nix-surface = {
-    count = 3;
-  };
+  nix-surface.count = 3;
 }