Add instruction on using CLI in windows prompt

[TheWindRider]

The example script in the Data Validation CLI section needs a little adaptation to work in windows prompt, otherwise double quotes won't be recognized and error will be reported as screenshot at bottom.

I may contribute an easy solution for windows to the README, but I don't know how to apply font color to output message in windows prompt.

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[TheWindRider]

@gitmagic-bot Looks like I don't have permission to add labels?

[jasonwalsh]

Hi @TheWindRider, thanks for reporting this. I think updating the README is a good idea.

As for coloring terminal output, I'm currently using the TermColors class. However, I think the __main__ module could be cleaned up a bit. I also found the termcolor module on PyPI and think it might be a better solution than using the TermColors class.

Any thoughts?

[TheWindRider]

Ok I will work on the README. @rightlag Would you prefer a new pair of screenshots, or more low-key modification like one line of example code that works in windows terminal?

I don't have good knowledge about the PyPI unfortunately.

[jasonwalsh]

Just adding the Windows command should be fine. Could you also add headers above the commands (e.g.):

macOS

$ command

Windows

> command