add config from gitlab

hosts/nixos-home/config/extra-services.nix

@@ -0,0 +1,40 @@
+{ config, pkgs, ... }:
+{
+        # ── Mullvad VPN ──
+        services.mullvad-vpn = {
+                enable = true;
+                package = pkgs.mullvad-vpn;
+        };
+
+        # ── Steam ──
+        programs.steam = {
+                enable = true;
+                remotePlay.openFirewall = true;
+                dedicatedServer.openFirewall = false;
+        };
+        programs.gamemode.enable = true;
+        programs.gamescope = {
+                enable = true;
+                capSysNice = true;
+        };
+
+        zramSwap = {
+                enable = true;
+                algorithm = "zstd";
+                memoryPercent = 50;
+        };
+
+        # ── VirtualBox (Oracle) ──
+        # virtualisation.virtualbox.host = {
+        #         enable = true;
+        #         enableExtensionPack = true;
+        # };
+        # users.extraGroups.vboxusers.members = [ "afoucaultc" ];
+
+        # ── Intégration KDE/Dolphin ──
+        services.gvfs.enable = true;
+        services.tumbler.enable = true;
+        environment.sessionVariables = {
+                NIXOS_OZONE_WL = "1";
+        };
+}