dhi: add repo mgmt info (#24106)

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## Description

Users were confused on how to manage access to mirrored DHI repos.
Gordon also didn't point in the right direction.
xref'd the Hub topics and mentioned a couple popular use-cases to help
make the connection.

## Related issues or tickets

ENGDOC-3185

## Reviews

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- [ ] Editorial review

---------

Signed-off-by: Craig Osterhout <craig.osterhout@docker.com>

Author: craig-osterhout

content/manuals/dhi/how-to/manage.md

@@ -12,6 +12,14 @@ On the **Manage** screen in Docker Hub, you can manage your mirrored Docker
 Hardened Image (DHI) repositories, mirrored DHI chart repositories, and
 customizations in your organization.
 
+Mirrored DHI repositories are standard Docker Hub repositories in your
+organization's namespace. They behave exactly like any other Hub repository,
+which means you can manage access and permissions, configure webhooks, and use
+other standard Hub features. See [Docker Hub
+repositories](/manuals/docker-hub/repos/_index.md) for details. The **Manage**
+screen provides DHI-specific actions like customizing images and stopping
+mirroring.
+
 ## Manage mirrored Docker Hardened Image repositories
 
 To manage your mirrored DHI repositories:

content/manuals/dhi/how-to/mirror.md

@@ -73,9 +73,14 @@ It may take a few minutes for all the tags to finish mirroring.
 After mirroring a repository, the repository appears in your organization's
 repository list, prefixed by `dhi-`. It will continue to receive updated images.
 
-Once mirrored, the repository works like any other private repository on Docker
-Hub and you can now customize it. To learn more about customization, see
-[Customize a Docker Hardened Image or chart](./customize.md).
+Once mirrored, the repository is a standard Docker Hub repository in your
+organization's namespace. It behaves exactly like any other Hub repository,
+which means you can manage access and permissions, configure webhooks, and use
+other standard Hub features. See [Docker Hub
+repositories](/manuals/docker-hub/repos/_index.md) for details.
+
+Additionally, mirrored DHI repositories let you customize images and charts. To
+learn more, see [Customize a Docker Hardened Image or chart](./customize.md).
 
 ### Webhook integration for syncing and alerts