Acceptance criteria:

**Necessary for 13.1**

* in the admin section for file storages, in the index page (listing all storages) you can chose all provider types, Nextcloud and OneDrive/SharePoint. Begin of the insertion
* If there is no Enterprise token, the OneDrive/SharePoint option has the Enterprise diamond icon.End of the insertion
* when you chose OneDrive/SharePoint
* with enterprise edition present show the configuration pages
* without enterprise diction present show Begin of the insertiona different view similar to `/admin/design/upsale`End of the insertion Begin of the deletion some sort of banner (to be defined and can be worked out in detail separately)End of the deletion

**In a subsequent release we need to consider what the consequence should look like when an Enterprise token gets removed or invalid**

* An existing integration cannot be edited
* Existing integrations can get deleted
* Begin of the insertionFailEnd of the insertion Begin of the deletion I am not sure what to do onEnd of the deletion the Begin of the insertioncontract for file link creation if no enterpise token is presentEnd of the insertion Begin of the deletion API levelEnd of the deletion