Build engine utilities for the Casbin-based authorization engine

[MaferMazu]

This includes enforcers, adapters, matchers, and other Casbin-specific tools needed for our APIs

[mariajgrimaldi]

We started a baseline implementation in this POC #37 after reviewing how it should look. We then decided to move forward with an initial version of the engine that meets the MVP needs. @BryanttV will publish our approach in this task soon. Thanks!