Users could manage clusters in KubeVela through a list of Vela CLI commands.
This command could list all clusters managed by KubeVela currently.
This command can join new cluster into KubeVela and name it as
cluster-prod. The joined cluster can be used in Multi-Environment Deployment.
This command can be used to detach cluster from KubeVela.
This command can rename cluster managed by KubeVela.