feat: use a more readable format for the `colorize_lumberdash` plugin

[mrverdant13]

Description

The current JSON format is not really dev-friendly when debugging. The stack trace gets trimmed and, thus, it is almost useless.

Alternative

I was thinking of a format similar to the logger package, which I've already integrated within a local-personal plugin but if this feature were built-in, it would be great.

If you are ok with this proposal, I'd be glad to make a PR 😄.