Example Usage
$ packemon --help
NAME:
   packemon - Packet monster (っ‘-’)╮=͟͟͞͞◒ ヽ( '-'ヽ) TUI tool for sending packets of arbitrary input and monitoring packets on any network interfaces (default: eth0). Windows/macOS/Linux

              ⌒丶、_ノ⌒丶、_ノ⌒丶、_ノ⌒丶、_ノ⌒丶、_ノ⌒丶、_ノ
                                    ○
                                   о
                                  。

                                 ,、-、_  __
                   ,、-―、_,、'´    ̄  `ヽ,
                  /       ・    .   l、
                  l,       ヾニニつ    `ヽ、
                   |                  `ヽ,
                   ノ                  ノ
                  /::::                 /
                /:::::::                ..::l、
               /::::::::::::::::::......:::::::.       ............::::::::::`l,
               l::::::::::::::::::::::::::::::::::::......   ....:::::::::::::::::::::::::::::`l,
               ヽ,:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::ノ
                  ̄ ̄``ヽ、_:::::::::::::::::::::::,、-―´ ̄`ヽ、,、-'
                        `ヽ―-―'´

USAGE:
   packemon [global options] [command [command options]]

VERSION:
   1.8.0 / revision cb61da2

COMMANDS:
   monitor, m,