#[command]Expand description
Define command.
§Format
#[command(sub_cmd $(<rs>|[os]|<rm...>|[om...]),* , desc)], explain:
sub_name: the name of sub-command you defined, it should be same as the name of command processing function$(<rs>|[os]|<rm...>|[om...]),*: arguments list, divided by comma. Only four types of arguments:,[OptionalSingle], ,[OptionalMultiple] desc: description of this sub-command, it’s using for display help information.
§Note
#[command] should be placed after all #[option]