feat: add wallpaper as module, add optionals

profiles/optional/home/gaming.nix

@@ -0,0 +1,27 @@
+{ pkgs, ... }:
+
+{
+  home.packages = with pkgs; [
+    lutris
+    wine
+    libudev-zero
+    dwarfs
+    fuse-overlayfs
+    # steam
+    # steam-run
+    patchelf
+    gamescope
+    vulkan-tools
+    moonlight-qt
+    ns-usbloader
+
+    # gog games installing
+    heroic
+
+    # minecraft
+    temurin-bin-17
+    (prismlauncher.override {
+      glfw = pkgs.glfw-wayland-minecraft;
+    })
+  ];
+}

profiles/optional/nixos/steam.nix

@@ -0,0 +1,10 @@
+{ pkgs, ... }:
+{
+
+  programs.steam = {
+    enable = true;
+    extraCompatPackages = [
+      pkgs.proton-ge-bin
+    ];
+  };
+}

profiles/optional/nixos/virtualbox.nix

@@ -0,0 +1,13 @@
+{ ... }:
+{
+  virtualisation.virtualbox = {
+    host = {
+      enable = true;
+      enableExtensionPack = true;
+    };
+    # leaving this here for future notice. setting guest.enable = true will make 'restarting sysinit-reactivation.target' take till timeout on nixos-rebuild switch
+    guest = {
+      enable = false;
+    };
+  };
+}