Refactor nix experimental-features to use on home and system side

modules/common.nix

@@ -0,0 +1,5 @@
+{ ... }:
+
+{
+  nix.settings.experimental-features = [ "nix-command" "flakes" ];
+}

modules/home/default.nix

@@ -2,6 +2,7 @@
 
 {
   imports = [
+    ../common.nix
     ./apps
     ./desktop
     ./shell
@@ -15,6 +16,5 @@
   };
 
   programs.home-manager.enable = true;
-  nix.settings.experimental-features = [ "nix-command" "flakes" ];
 }
 

modules/system/common.nix

@@ -1,6 +1,10 @@
 { pkgs, ... }:
 
 {
+  imports = [
+    ../common.nix
+  ];
+
   # Set your time zone.
   time.timeZone = "Europe/Paris";