Additional preview environments support using the new Package Manifest 15+

[IbrahimMNada]

This link shows that you can add multi environments.

but its not working on umbraco15v and the SendingContentNotification class is removed

ref this issue : #17035

ref this commit :

Umbraco-CMS/src/Umbraco.Web.UI.Client/src/packages/documents/documents/workspace/actions/save-and-preview.action.ts

Line 7 in bff321e

// TODO: Investigate how additional preview environments can be supported. [LK:2024-05-16]

lets add a manifiest with type preview env and handle this issue

[nul800sebastiaan]

Thanks, we're aware, please subscribe to updates on #17035