feature: support multi-node based provisioning

[hsinhoyeh]

like kubeadm which enables us to configure a cluster with multi-nodes, this could be helpful for deploying production-scale solution

[hsinhoyeh]

Multi-node version should be based on kubeadm and here are some examples of how to configure your cluster with kubeadm.

The next would be how to put default kubeconfig.yaml into the workspace such that mulitkf could recognize it.
Once we have done that, we could benefit from the plugin commands.