Improve CLI output

[WebFreak001]

with the new colored output PR merged (#2268) a few things now look a little weird, so opening an issue to track them:

• [x] dub list and dub list-overrides now has a lot of whitespace to the left
• [x] dub search is not colored/bolded
• [x] some single-line error messages look a little confusing with the extra whitespace, such as running dub convert --format=sdl twice
• [ ] dub lint dscanner output is not colored / does not follow dub output
• [ ] dub dustmite does not have any coloring
• [ ] Failed to find any versions for package somepackage, referenced by myapp ~master does not have coloring

[Geod24]

@WebFreak001 : Want to finish this before next release ?