Create a ck use like command

[itdove]

cm use cluster <cluster_name>

• Manage multiple clusterpool hosts
• Consider hopping between managed, claims, and hub, and clustersets
• Accept both cluster claim name and cluster name
• Maintain hub context and allow you to jump back to the hub (maybe cm use cm)

[itdove]

• Consider hopping between managed, claims, and hub, and clustersets: Only claims name and clusterpoolhost are implemented see cm use must accept cluster name as parameter  #46 for cluster name.
• Maintain hub context and allow you to jump back to the hub (maybe cm use cm) works if no KUBECONFIG set if a KUBECONFIG is set the kubeconfig will be used.