createCollection, validation and middleware

Hi,

At first, good job, very nice lib! :)
I have questions:

1. how i can create collection with schema, or with simple validation on mongo side?

2. how i can transform mongo duplication error with code 11000 tohuman readable message throught middleware?

Thanks

The issue names no files, tests, or entry points. First clarify how Monk exposes collection creation and middleware, then inspect the relevant MongoDB integration documentation or examples; done means documenting schema or validation setup and a middleware path for readable duplicate-key errors.

Written by the indexing model from the issue text.