[TASK] Prepare documentation move before release

New folder and includes to render the changelog for
the upcomming version.

Change-Id: I0440dcfdaf5541da5e8dbe8b8b681a477951fc14
Resolves: #85202
Releases: master
Reviewed-on: https://review.typo3.org/57152


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>