restructure system configuration

system/modules/programs/vm.nix

@@ -0,0 +1,28 @@
+{config, pkgs, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    virt-manager
+    virt-viewer
+    spice 
+    spice-gtk
+    spice-protocol
+    win-virtio
+    win-spice
+    gnome.adwaita-icon-theme
+  ];
+  
+  virtualisation = {
+    libvirtd = {
+      enable = true;
+      qemu = {
+        swtpm.enable = true;
+        ovmf.enable = true;
+        ovmf.packages = [ pkgs.OVMFFull.fd ];
+      };
+    };
+    spiceUSBRedirection.enable = true;
+  };
+  services.spice-vdagentd.enable = true;
+}
+