Feature request/discussion: add color to codeframe formatter

[elektronik2k5]

Hello and thanks for writing and maintaining eslint!

I was wondering whether there's any reason why the codeframe formatter output is always monochromatic. Is there any reason we shouldn't enable syntax highlighting?

The version of ESLint you are using.
7.31.0

The problem you want to solve.
codeframe formatter output is monochromatic even in color capable TTYs.

Your take on the correct solution to problem.
Enable colors by setting the highlightCode option to true. I believe that'll handle everything automatically. If we wanna be more pedantic and consistent then we can respect eslint's --color/--no-color CLI arguments.

Are you willing to submit a pull request to implement this change?
Yes, definitely! :)

Tagging original contributor @vitorbal for historical context.

[nzakas]

The codeframe formatter is being removed in v8.0.0, so we aren't making any further changes to it.