Feature: #84983 - BE ViewHelper for EditDocumentController 

See forge#84983

Description 

Linking to FormEngine / EditDocumentController in fluid templates of backend modules to edit database records and to create new records, has been simplified by introducing a series of new view helpers.

Usage: 

Impact 

Extensions must no longer provide their own ViewHelpers for editing and creating records. The ones provided from ext:backend are public API.