Replace PrimaryContent usages automatically

[bwaidelich]

Currently usages of Neos.Neos:PrimaryContent are not replaced automatically.

Instead a comment is added to the top of using files:

// TODO 9.0 migration: You need to refactor "Neos.Neos:PrimaryContent" to use "Neos.Neos:ContentCollection" instead.

// ...

main = Neos.Neos:PrimaryContent

Instead, we could consider replacing those usages directly.

Danger: With the current rectors it's not possible yet, to only replace the usages of the prototypes.. If we were to use the FusionReplacePrototypeNameRector to replace PrimaryContent, overrides such as

prototype(Neos.Neos:PrimaryContent) {
  someCustomCase {
    condition = ...
    renderer = 'this will be lost'
  }
}

would be replaced, too.

So, we would need to extend the FusionReplacePrototypeNameRector by some flag that allows us to exclude prototype definitions. Also we should extend other rectors like FusionPrototypeNameAddCommentRector such that the can target only prototype definitions/overrides.

Alternatively we should just keep Neos.Neos:PrimaryContent usages for now since the prototype still exists in 9.0 (even if deprecated)

Relates:

• BUGFIX: Newly created node not selected neos-development-collection#4281
• !!! TASK: Deprecate and refactor Neos.Neos:PrimaryContent neos-development-collection#4682
• BUG: out-of-band-rendering throws an error when creating a new childnode for a content-collection neos-development-collection#4622