improve machine error when running on Linux #53
Merged
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On Linux, Podman Desktop can talk to the Podman socket of the host and to the ones of the Linux VM. As outlinted in #42, talking to socket of the host's Podman is currently not supported by the extension. While logging into the container registry is perfectly fine, running subscriptio-manager is not; it requires root privileges to install and run it. So instead of a silent error, throw a user-visible error indicating that it's currently not supported on a Linux host.
Fixes: #42