JSON schemas for NIST 600-1 GAI profile attestation, template creation, and verification

[jcockhren]

This JSON schema reflects the tables of suggested actions that appear in NIST 600-1.

This schema will help underpin further experimentations on techniques for enabling:

1. The creation of VRTs by Other AI Actors.
2. First and Third-party AI Actors to use their existing compliance efforts and artifacts
3. End Users to verify AI Actor attestations with ease