feat(libvirtd): adding virtualisation

modules/nixos/services/libvirtd/default.nix

@@ -0,0 +1,38 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}:
+let
+  inherit (lib) mkIf mkEnableOption;
+  cfg = config.nixos.services.libvirtd;
+in
+{
+  options = {
+    nixos.services.libvirtd.enable = mkEnableOption "Enables libvirtd";
+  };
+
+  config = mkIf cfg.enable {
+    networking.firewall.trustedInterfaces = [ "virbr0" ];
+    environment.systemPackages = with pkgs; [
+      virt-manager
+      virt-viewer
+    ];
+
+    virtualisation = {
+      kvmgt.enable = true;
+      spiceUSBRedirection.enable = true;
+      libvirtd = {
+        enable = true;
+        onShutdown = "shutdown";
+        qemu = {
+          ovmf = {
+            enable = true;
+            packages = [ pkgs.OVMFFull.fd ];
+          };
+        };
+      };
+    };
+  };
+}