Colorful errors

Summary

Implement colored error and panic reports

Motivation

As a follow-up to #1634, which added colour to the CLI interface, we should implement something similar for errors and panics. I think this would make them easier to read and more user-friendly.

I came up with 3 options of implementing this: 1). Simply replace anyhow with color-eyre

• pros:
  • easy to drop-in replace anyhow
• cons:
  • bring some odd dependencies (e.g. tracing, backtrace)
  • not that flexible, can be confusing if .context() called many times

1. Add eyre and implement custom error report

• pros:
  • easy to drop-in replace anyhow
  • customisable
• cons:
  • reports are not so detailed, requires many extension traits to get detailed report
  • can be confusing if error has many sources

1. Use miette

• pros:
  • really comprehensive and beatiful error reports
  • derive macros for error types
• cons:
  • probably overkill
  • 2MB built with --release, really big crate