[Request]: FreeBSD container support

### Feature or enhancement request details

The FreeBSD container extensions are nearly standardised and the FreeBSD project is producing base images.

I've been running FreeBSD containers on macOS for about a year with a patched version of Podman that runs a FreeBSD VM to run the containers (I put together some infrastructure for building FreeBSD VM images that did everything that Podman expected), but it would be great to be able to run them with the one-VM-per-container model of this project and have an easy way of working with FreeBSD containers on macOS.

Are the requirements for how the VM image interacts with the host environment documented?

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct