Implement Migrations

[PineappleIOnic]

What does this PR do?

This PR Implements the API and Service for Migrations to work

Test Plan

Most testing will be handled by the Transfer project instead due to the reliance on third party/mock API's to test it.

Checklist

• Have you read the Contributing Guidelines on issues?
• If the PR includes a change to an API's metadata (desc, label, params, etc.), does it also include updated API specs and example docs?

[christyjacob4]

@PineappleIOnic PR looks good! Lets make sure we update the library and we can merge this!!