In our specific package case, we didn't need some features, but I do want to mention them and show you how to use them, in case your packages need them.
Eloquent Models
This one is pretty easy, you just create a Model class in the /src/Models of the package and namespace it correctly.
Then, your Controllers (or the Controllers outside the package) may just use the Model by loading it from the correct namespace....
It's very useful thank you very much