Add colors to the vulnerability scan module

[g3rzi]

Pull Request (PR) Checklist

• I have read the CONTRIBUTING doc
• PR is from a topic/feature/bugfix branch off the dev branch (right side)
• PR is against the dev branch (left side)
• Merlin compiles without errors
• Passes linting checks and unit tests
• Updated CHANGELOG
• Updated README documentation (if applicable)
• Update Merlin version number in pkg/merlin.go (if applicable)

Change Type

• Addition
• Bugfix
• Modification
• Removal
• Security

Description

I added colors to make the results more clearly for the user.
It now looks like that:
Before:

After:

Not sure if the log's colors are too much, we can also think to make the logs simpler but it also OK to leave it like that.
I think that we can do the same changes in other modules to make easier to read for the user.