added a search command

[danielamkaer]

Created a search command that can run a query job on humio.

Search

Usage:
  humioctl search <repo> <query> [flags]

Flags:
      --complete       Wait for query to complete before printing result. Mostly useful for aggregates.
      --end string     Query end time
  -f, --fmt string     Format string if the result is an event list
                       Insert fields by wrapping field names in brackets, e.g. {@timestamp}']
                       Limited format modifiers are supported such as {@timestamp:40} which will right align and left pad @timestamp to 40 characters.
                       {@timestamp:-40} left aligns and right pads to 40 characters. (default "{@timestamp} {@rawstring}")
  -h, --help           help for search
      --live           Run a live search and keep outputting until interrupted.
      --start string   Query start time (default "10m")