[bin] Improve prettyjson helper script

[0xdevalias]

• https://github.com/0xdevalias/dotfiles/blob/devalias/bin/prettyjson
• https://stackoverflow.com/questions/20265439/how-can-i-pretty-print-a-json-file-from-the-command-line/24951417

#!/bin/bash
# Simple JSON pretty print for contents on your cliboard
pbpaste | json_pp | pbcopy

# https://stackoverflow.com/questions/20265439/how-can-i-pretty-print-a-json-file-from-the-command-line/24951417
# TODO:
#   if Json_pp, then use that
#   if python json.tool, then use that
#   if jq, then use that
#   etc

# TODO:
#   if data being piped in, use that
#   else pbpaste
#
#   if data being piped out, allow it
#   else pbcopy