Feature request: Add support for podman command filtering (like docker)

[yanickgirouard]

Podman is the recommended and supported replacement for docker on RHEL and even though there is a podman-docker package available to keep using "docker" but actually running podman, the output might slightly differ even though most commands are fully compatible.

I have tested using the docker alias pointing to podman (with podman-docker), and RTK seemed to be able to filter the output, but it would be better if we could just use podman directly.

Could it be added?