Provide guidance for hosted vs managed content

Add the following Use Case to 10.1.1 use cases as a new section: Hosted Content Terminology services may act as a repository for content that is managed and created elsewhere (i.e. hosted content AKA a convenience copy), or they may provide features to author and manage content directly, or any combination. When hosting content that is managed elsewhere, the service must ensure that the content of the resource is materially the same (i.e. the values for all elements are the same where those elements are specified in the Shareable and Publishable profiles) as the source of truth. In particular, for systems that provide both management and hosting of externally managed content, the status element for hosted content SHALL be the same as the status of the content in the source of truth.