code: def register(parser):
      
      cmd_machines.register(parser)
      cmd_machine.register(parser)
      cmd_allocate.register(parser)
      cmd_deploy.register(parser)
      cmd_commission.register(parser)
      cmd_release.register(parser)
      cmd_abort.register(parser)
      cmd_mark_fixed.register(parser)
      cmd_mark_broken.register(parser)
      cmd_power_off.register(parser)
      cmd_power_on.register(parser)
      cmd_ssh.register(parser)
docs: Register commands with the given parser.