Add verbose mode and flag to the installer

[WichoGZF]

Is your feature request related to a problem? Please describe.
I find that the addition of a verbose flag to the installer, which shows the complete output of the commands ran would really help with debugging installation issues.

Describe the solution you'd like
Add a verbose flag to the installer that shows the entire output of the commands ran.

Describe alternatives you've considered
X

Additional context
I could do this one.