Add GitLab Token input and warning to example

Description

• We want to add a warning here because this is a developer tool, and as such it could be used while in a non-secure state. Users should take caution.
• We also remove the sensitive keys from being stored

But why?

This is needed to manually test the commit actions of the upcoming Draft: Add SourceControlSystem (ALL PARTS SPIKE) (!77 - closed)

Screenshot

Config form	Config form (expanded)	Local Storage (doesn't include sensitive info)