Use auto mapper to manage transfers between commands and dtos

[carlsixsmith-moj]

Rather than include DTOs inside the commands we can use automapper to keep things decoupled.

This is a comment on the general architecture of the system, not this specific pull request

Originally posted by @carlsixsmith-moj in #25 (comment)

[caiolagreca]

Hey!

I'm interested in contributing to this project and would like to help address this issue.
Is anyone currently working on this? If not, I'd be happy to start working on it.

Also, this would be my first contribution to an open source project, so any guidance would be greatly appreciated!

Thank you