Add support for adding custom traits to models

[deegital]

I had the need to add additional traits to the models, in my case it was spatie's laravel-permission HasRules trait. This PR adds compatibility for the following syntax:

User:
    name: string
    traits:
      - Spatie\Permission\Traits\HasRoles

[jasonmccreary]

This is probably not something I'd add myself. However, since you have done the work, I am willing to if you can make some small changes:

• Move traits under the existing meta property to minimize naming conflicts.
• Ensure this is supported for controllers as well.

[deegital]

Sounds good, I will add those changes!