Get rid of the ContentRichEntityInterface

[alexander-schranz]

The ContentRichEntityInterface has a big disadvantage that we can not add Content to a third party Entity or a Object not in our Context. And I personally think it should be possible to add Content to every Doctrine Entity, also if it comes from a third party bundle where we are not able to add an Interface to it.

As written in the Rename ContentRichEntity to Resource Issue.

Currently the ContentRichEntityInterface has the following methods:

• getId()
• getDimensionContents()
• createDimensionContent()
• addDimensionContent(DimensionContentInterface $dimensionContent)
• removeDimensionContent(DimensionContentInterface $dimensionContent):

And the DimensionContentInterface reference to it with the following methods:

• getResource()
• getResourceKey()
• getResourceId (RoutableInterface)

So we could replace the exist function:

• getId() -> getResourceId()
• getDimensionContents() -> DimensionContentRepository should be used here
• createDimensionContent() -> DimensionContentInterface::create function given the resource object create(object $resource)
• addDimensionContent(DimensionContentInterface $dimensionContent) -> not needed if a relation on doctrine exist can be called in create could call the add on the resource
• removeDimensionContent(DimensionContentInterface $dimensionContent): -> never used or called by us