start a remote interactive shell in the target device
usage: fx shell [-h|--help] [--info | [<ssh flags>] <command>] Creates an SSH connection with a device and executes a command. Arguments: -h|--help Print out this message. --info Show information about SSH keys and the target device and exit. <ssh flags> Flags and command are passed to SSH as is. Consult SSH help for a list of available flags.