Usage of rust-vmm crates

Where applicable we should use [rust-vmm] crates to increase composability and gain features (see #2) for free.

Should we introduce these to our public API? A quick look at the [kvm-ioctls] crate shows that they do not actually use any of the surrounding [rust-vmm] ecosystem, like [vm-memory]. Given that [windows-hypervisor] operates much in the same way as [kvm-ioctls] should we instead focus on a public API which provides maximum flexibility and have the consumer rely on [rust-vmm]?

[vm-memory]: https://github.com/rust-vmm/vm-memory/
[kvm-ioctls]: https://github.com/rust-vmm/kvm-ioctls/
[windows-hypervisor]: https://github.com/emesare/windows-hypervisor/
[rust-vmm]: https://github.com/rust-vmm/