create_vm: add CD/DVD drive with optional ISO boot

Previously created VMs had no CD/DVD drive, so attach_iso failed with
'No CD/DVD drive found' and there was no way to install a guest from an
ISO. create_vm now always adds a CD/DVD drive on the default IDE
controller. New optional args iso_path/iso_datastore back the drive with
an ISO and boot_from_iso puts the CD/DVD first in the boot order, giving
MCP clients a complete create-and-install-from-ISO path.

src/mcvsphere/mixins/vm_lifecycle.py

@@ -99,7 +99,7 @@ class VMLifecycleMixin(MCPMixin):
 
     @mcp_tool(
         name="create_vm",
-        description="Create a new virtual machine with specified resources",
+        description="Create a new virtual machine with specified resources and a CD/DVD drive (optionally booting from an ISO)",
         annotations=ToolAnnotations(destructiveHint=False, idempotentHint=False),
     )
     def create_vm(
@@ -111,8 +111,28 @@ class VMLifecycleMixin(MCPMixin):
         datastore: str | None = None,
         network: str | None = None,
         guest_id: str = "otherGuest64",
+        iso_path: str | None = None,
+        iso_datastore: str | None = None,
+        boot_from_iso: bool = True,
     ) -> str:
-        """Create a new virtual machine with specified configuration."""
+        """Create a new virtual machine with specified configuration.
+
+        The VM always gets a CD/DVD drive. If ``iso_path`` is given, the drive
+        is backed by that ISO and connected at power-on; otherwise it is an
+        empty client device (so ``attach_iso`` can mount media later).
+
+        Args:
+            name: VM name
+            cpu: vCPU count
+            memory_mb: Memory in MB
+            disk_gb: Primary disk size in GB
+            datastore: Datastore for the VM (default: largest available)
+            network: Port group for the NIC (default: configured network)
+            guest_id: vSphere guest OS identifier
+            iso_path: ISO path on a datastore (e.g. 'iso/ubuntu.iso') to mount in the CD/DVD drive
+            iso_datastore: Datastore holding the ISO (default: the VM's datastore)
+            boot_from_iso: When an ISO is given, put the CD/DVD first in the boot order
+        """
         # Resolve datastore
         datastore_obj = self.conn.datastore
         if datastore:
@@ -195,6 +215,40 @@ class VMLifecycleMixin(MCPMixin):
             )
             device_specs.append(nic_spec)
 
+        # Add a CD/DVD drive on the default IDE controller (vSphere auto-creates
+        # IDE controller key 200). Backed by an ISO if one was requested,
+        # otherwise an empty client device so media can be mounted later.
+        cdrom_spec = vim.vm.device.VirtualDeviceSpec()
+        cdrom_spec.operation = vim.vm.device.VirtualDeviceSpec.Operation.add
+        cdrom_spec.device = vim.vm.device.VirtualCdrom()
+        cdrom_spec.device.controllerKey = 200
+        cdrom_spec.device.unitNumber = 0
+        cdrom_spec.device.key = -2
+        connectable = vim.vm.device.VirtualDevice.ConnectInfo()
+        connectable.allowGuestControl = True
+        connectable.connected = False
+
+        if iso_path:
+            iso_ds = iso_datastore or datastore_obj.name
+            backing = vim.vm.device.VirtualCdrom.IsoBackingInfo()
+            backing.fileName = f"[{iso_ds}] {iso_path}"
+            connectable.startConnected = True
+        else:
+            backing = vim.vm.device.VirtualCdrom.RemotePassthroughBackingInfo()
+            backing.deviceName = ""
+            backing.exclusive = False
+            connectable.startConnected = False
+
+        cdrom_spec.device.backing = backing
+        cdrom_spec.device.connectable = connectable
+        device_specs.append(cdrom_spec)
+
+        # Boot from the CD/DVD first when installing from an ISO
+        if iso_path and boot_from_iso:
+            vm_spec.bootOptions = vim.vm.BootOptions(
+                bootOrder=[vim.vm.BootOptions.BootableCdromDevice()]
+            )
+
         vm_spec.deviceChange = device_specs
 
         # Create VM