feat: make configuration to allow publishToMavenLocal

[charlottemougenot]

Is your feature request related to a problem? Please describe.

I would like to be able to publish library to mavenLocal so I can test components in apps other than in the sample when I work on components.

Additional context

Error that shows when you run gradle publishToMavenLocal

23: Task failed with an exception.
-----------
* What went wrong:
Execution failed for task ':vitamin:signMavenPublication'.
> Cannot perform signing task ':vitamin:signMavenPublication' because it has no configured signatory