feat(binto): add nix gaming with lowL pipewire plus switch to xanmod

hosts/binto/configuration.nix

@@ -11,6 +11,7 @@
     ../../modules/printer.nix
 
     ./modules/nvidia.nix
+    ./modules/nix-gaming.nix
   ];
 
   networking = {

hosts/binto/hardware-configuration.nix

@@ -2,7 +2,7 @@
   imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
 
   boot = {
-    kernelPackages = pkgs.linuxPackages_latest;
+    kernelPackages = pkgs.linuxPackages_xanmod_latest;
     kernelModules = [ "kvm-amd" ];
     extraModulePackages = with config.boot.kernelPackages; [
       v4l2loopback

hosts/binto/modules/nix-gaming.nix

@@ -0,0 +1,7 @@
+# configuration.nix
+{
+  nix.settings = {
+    substituters = ["https://nix-gaming.cachix.org"];
+    trusted-public-keys = ["nix-gaming.cachix.org-1:nbjlureqMbRAxR1gJ/f3hxemL9svXaZF/Ees8vCUUs4="];
+  };
+}