This change prepares some code areas within the
Fluid-based page module to be re-used at a later point,
especially within the PagePositionMap.

This is a pre-patch to make life easier.

Resolves: #104934
Releases: main
Change-Id: I2296db0e5d4ab4ef9b150a20e02964b0c2fc4af4
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/86044


Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Andreas Kienast <a.fernandez@scripting-base.de>
Reviewed-by: Andreas Kienast <a.fernandez@scripting-base.de>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>