GCODE CLI sender for marlin

Tested on Tevo Tornado with marlin 1.1.8

1 - Usage:

usage: python cli.py [-h] [--serial-port] [--baudrate]

arguments:
  -h, --help
  --serial-port STRING
  --baudrates INT

2 - Examples:

Windows :

python cli.py --serial-port COM4 --baudrate 250000
Command: M105
b'ok T:19.92 /0.00 B:20.55 /0.00 @:0 B@:0\n'

Linux :

python cli.py --serial-port /dev/ttyUSB0 --baudrate 250000
Command: M105
b'ok T:19.92 /0.00 B:20.55 /0.00 @:0 B@:0\n'