FEATURE: Backport Neos.Neos:Site NodeType

[Sebobo]

[ahaeslich]

In a project of mine, I add this for Neos.Neos:Site:

'Neos.ContentRepository:Root':
  abstract: true

#
# Abstract NodeType for a Neos.Neos site.
# Each homepage must extend this NodeType.
# Nodes of this type must be direct children of the Neos.Neos:Site Root
# and must not be created at any other place in the tree.
#
'Neos.Neos:Site':
  abstract: true
  superTypes:
    'Neos.Neos:Document': true

#
# Root NodeType for a Neos.Neos content repository.
# Any Neos Site node must be its direct child.
#
'Neos.Neos:Sites':
  superTypes:
    'Neos.ContentRepository:Root': true
  constraints:
    nodeTypes:
      '*': false
      'Neos.Neos:Site': true

It's been a while so I am unsure right now, if we also need Neos.ContentRepository:Root