General: Add project code to anatomy

[iLLiCiTiT]

Brief description

Added attribute project_code to Anatomy object.

Description

Anatomy already have access to almost all attributes from project anatomy except project code. This PR changing it. Technically Anatomy is everything what would be needed to get fill data of project.

{
    "project": {
        "name": anatomy.project_name,
        "code": anatomy.project_code
    }
}

Testing notes:

Nothing has changed for user.