add radish-vm for testing

hosts/radish-vm/hardware-configuration.nix

@@ -0,0 +1,64 @@
+# VM Hardware Configuration Template
+# This file will be generated during VM installation with `nixos-generate-config`
+# But here's a template for common VM setups
+
+{
+  lib,
+  modulesPath,
+  ...
+}:
+
+{
+  imports = [
+    (modulesPath + "/profiles/qemu-guest.nix")
+  ];
+
+  # Boot configuration for VMs
+  boot = {
+    initrd = {
+      availableKernelModules = [
+        "ahci"
+        "xhci_pci"
+        "virtio_pci"
+        "virtio_scsi"
+        "sr_mod"
+        "virtio_blk"
+        "vmw_pvscsi"
+      ];
+      kernelModules = [ ];
+    };
+    kernelModules = [ ];
+    extraModulePackages = [ ];
+  };
+
+  networking = {
+    useDHCP = lib.mkDefault true;
+  };
+
+  hardware = {
+    graphics = {
+      enable = true;
+    };
+  };
+
+  services = {
+    spice-vdagentd.enable = lib.mkDefault true;
+    qemuGuest.enable = lib.mkDefault true;
+  };
+
+  virtualisation = {
+    vmware.guest.enable = lib.mkDefault false;
+    virtualbox.guest.enable = lib.mkDefault false;
+    hypervGuest.enable = lib.mkDefault false;
+    vmVariant.virtualisation = {
+      memorySize = 8192;
+      cores = 4;
+    };
+  };
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+
+  powerManagement = {
+    enable = lib.mkDefault false;
+  };
+}