Support exporting/importing revisions

The attached patch adds a single_content_sync_revisions submodule, which adds this feature.

Reviewed patch #2 and works fine with version 1.4. Please refer screenshot
Step:
Created a node with multiple revisions.
Exported the node.
Result: All revisions are exported now.

Hi Boobaa,

Thank you for your effort!
A few thoughts here.

1) We definitely don't want to have accessCheck(FALSE). The current user may not have permissions to view all revisions; this code will give them read access. This is a security/data disclosure issue.

2) The core version requirement should be core_version_requirement: ^9.3 || ^10, same as in root info.yml.

3) The following line will produce a warning if there are no revisions in YML file:
if ($content['revisions']) {

4) The revision creation time should be import/exported the same way we do for created/changed timestamps.

5) We'd likely need a test for this; also, please create the merge request to run automated tests.

Thanks!

Hi,
I have tried to using this patch it is getting exported with revision but as I a paragraph field when i am import it i am getting as
Call to undefined method Drupal\paragraphs\Entity\Paragraph::setRevisionCreationTime() in Drupal\single_content_sync_revisions\ImportSubscriber->onImportEvent() (line 52 )... please look to this issue as well