refactor(flake-parts): initial flake-parts configuration

inputs/system/modules/base/virtualization/default.nix

@@ -0,0 +1,33 @@
+{ lib, config, pkgs, ... }:
+
+let
+  cfg = config.systemModules.virtualisation;
+in
+
+{
+  config = lib.mkIf cfg.enable {
+    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;
+  };
+}