Update cosmoctl commands

[jlandowner]

• Add command alias create, get, delete, run, stop
• Rename workspace add-network-rule to create networkrule and workspace remove-network-rule to delete networkrule

$ cosmoctl 

Command line tool to manipulate comso
Complete documentation is available at http://github.com/cosmo-workspace/cosmo

MIT 2021 cosmo-workspace/cosmo

Usage:
  cosmoctl [command]

Available Commands:
  completion  Generate the autocompletion script for the specified shell
  create      Create cosmo resources
  delete      Delete cosmo resources
  get         Get cosmo resources
  help        Help about any command
  networkrule Manipulate NetworkRule of Workspace resource
  run         Run workload resources
  stop        Stop workload resources
  template    Manipulate Template resource
  user        Manipulate User resource
  version     Print the version number
  workspace   Manipulate Workspace resource

Flags:
      --context string      kube-context (default: current context)
  -h, --help                help for cosmoctl
      --kubeconfig string   kubeconfig file path (default: $HOME/.kube/config)
  -v, --verbose int         log level. -1:DISABLED, 0:INFO, 1:DEBUG, 2:ALL (default -1)

Use "cosmoctl [command] --help" for more information about a command.