Is your feature request related to a problem? Please describe.
If the system-controller and/or the podman socket endpoint are not running, and user runs the
skupper system uninstall command, an error message is being displayed, see:

failed to uninstall : failed to create container client: container engine is not available on the provided endpoint: "unix:///run/user/1000/podman/podman.sock" (unable to verify version) - Get "http://unix/version": dial unix /run/user/1000/podman/podman.sock: connect: connection refused

Describe the solution you'd like
On such error, skupper could educate user to run system install first, as it is unable to communicate with the container engine.