shared/shell: Print commands when --help option is given
This enables the user to see what command could be given in the
non-interactive mode e.g:
> bluetooth-player --help
bluetooth-player ver 5.50
Usage:
bluetooth-player [--options] [commands]
Options:
--timeout Timeout in seconds for non-interactive mode
--version Display version
--help Display help
Commands:
list List available players
show Player information
select Select default player
play Start playback
pause Pause playback
stop Stop playback
next Jump to next item
previous Jump to previous item
fast-forward Fast forward playback
rewind Rewind playback
equalizer Enable/Disable equalizer
repeat Set repeat mode
shuffle Set shuffle mode
scan Set scan mode
change-folder Change current folder
list-items List items of current folder
search Search items containing string
queue Add item to playlist queue
show-item Show item information
1 file changed
