The manager only requires the CLI's configuration; define a shallow interface for this so that we don't have to import cli/command. In addition to the CLI's configuration, `runHooks` also used the CLI's configured StdErr output. We set the Cobra input and output streams to be the same as the DockerCLI outputs in [newDockerCommand] and [newPluginCommand], so we can get this from the Cobra command. [newDockerCommand]:ea1f10b440/cmd/docker/docker.go (L148-L150)[newPluginCommand]:ea1f10b440/cli-plugins/plugin/plugin.go (L166-L168)Signed-off-by: Sebastiaan van Stijn <github@gone.nl>