add color support

Closes #2019 (closed)

This is a draft MR to add colored output to pmbootstrap.
The current colorless output is IMO really hard to read as it is just a big block of text. Adding some color could improve this.

Open Questions:

• Should it be optional? (https://no-color.org/)
  • Opt-in/out?
• How much color?
• Coding style

Current `pacman` output for reference, using color and different font weights.