Add some color to the relevant filename in terminal

[bep]

We have now pretty good "filname + line number" in the logs, and it would be good if they could have a color that would stick out a little on non-Windows terminals, so it is easy to spot where to "click" in editors that support this.

Error building site: "/Users/bep/sites/hugotest/content/scodes/embedded.md:22:34": unrecognized character in shortcode action: U+003E '>'. Note: Parameters with non-alphanumeric args must be quoted

This is how that same error renders in the browser:

Color for that formatter is #e6db74.

Also see #4414

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.