[CTF] Trust function manager

[gmej]

This module is intended to manage the trust function, possible multiple trust functions, inside the CTF. The trust function is a feature that evaluates the trust level of a given FHIR resource. This function specifies the policy by which each level is assigned, thus it is interesting for different jurisdictions to implement their own policies, and even different user roles (or even individual users) to be able to have their specific policies.

Requirements and more information available in D3.12