Restructure Config

• Create a new folder cmd/config
• Create a root command in that folder similar to those in
  • cmd/deploy/root.go
  • cmd/k3d/root.go
  • cmd/update/root.go
• Move cmd/config.go -> cmd/config/view.go and cmd/config_test.go -> cmd/config/view_test.go
  • Also update the references so that the commands do the following
    • bbctl config lists help for the config subcommand
    • bbctl config view does what bbctl config does now
• Add test for everything