Please provide mechanisms for launching unattended OS installations in VMs, especially Linux kickstart/preseeding

The feature must provide some automated way of "typing" on the console after the VM boots.

The feature should also provide some way of launching an ephemeral web server and related infrastructure that allows a guest to retrieve an unattended installation settings file.

HashiCorp Packer's qemu builder includes good examples of both features: https://developer.hashicorp.com/packer/plugins/builders/qemu