(change) Support pterm for GOFF cli

[thomaspoignant]

Motivation

GO Feature Flag cli is using cobra and display everything in the console without styling.

The code of the cli is located here.

Requirements

We want to introduce styling in the output, and for this one idea is to use pterm/pterm to display errors / info in a more delightful way.

[OriginalMeet]

Hi Thomas, I would like to work on this issue. Thanks.

[thomaspoignant]

@OriginalMeet sorry for the late reply, if you still want to work on it, I can assign it to yourself.