Support podman based distributions

[tmds]

Distributions like Fedora, Red Hat Enterprise Linux provide podman instead of docker.

podman has high compatibility with docker but the implementation is different. podman doesn't have a daemon that runs as root. This allows regular users to launch containers without elevating their privileges.

It would be nice if tye supports podman based distributions and is able to work in a rootless mode. (The network creation currently performed by tye requires root.)

I can help implement this.

cc @davidfowl

[davidfowl]

I think this makes sense to do. We need to figure out what to do about some of the options in the tye.yaml. They have the name docker 😄. I'm also interested to see how compatible the APIs are (I know what podman is but I haven't looked deeply enough to understand the differences). Maybe throw up a draft PR with the implementation so we can learn more and then we can iterate from there.