Add list clusters command

[nabuskey]

Add the list command to:

• List clusters across all providers
• List their parameters. Host, port, etc

[cmoulliard]

• List clusters across all providers

This is mandatory as until only docker provider is supported and we will got error using podman

failed to list clusters: failed to list clusters: command "docker ps -a --filter label=io.x-k8s.kind.cluster --format '{{.Label "io.x-k8s.kind.cluster"}}'" failed with error: exec: "docker": executable file not found in $PATH

[cmoulliard]

Question: Should we list the ports information as such (aka like on the container) ?

CONTAINER ID  IMAGE                           COMMAND     CREATED       STATUS       PORTS                                             NAMES
7299d0d75f41  docker.io/kindest/node:v1.30.3              9 hours ago   Up 9 hours   0.0.0.0:8443->443/tcp, 127.0.0.1:65073->6443/tcp  my-konflux-control-plane

[nabuskey]

Yeah we should print ports because we cannot bind to the port that's already used.