[TASK] Improve Page TSconfig submodule naming

Add headline and a descriptive text to overview of Page TSconfig on
page zero. Update labels in table header too.

Resolves: #99597
Releases: main
Change-Id: Ifd80e361ffc1817818d1489a433886023d1982ca
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77467


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>