AppendPluginCmd create a command as root of config plugin.

NewConfigPluginFetchCmd create a command for fetching plugin metadata.

NewConfigPluginInstallCmd create a command for fetching plugin metadata.

NewConfigPluginListCmd create a command for list all jcli plugins.

NewConfigPluginUninstallCmd create a command to uninstall a plugin.

NoFileCompletion avoid completion with files.

ValidPluginNames returns the valid plugin name list.