[DOCS] Document reports extension

Document the status quo and the recent changes.

resolves https://github.com/TYPO3-Documentation/Changelog-To-Doc/issues/84
resolves https://github.com/TYPO3-Documentation/Changelog-To-Doc/issues/77

Resolves: #97758
Releases: main
Change-Id: I35596dad6f9f840f21fac42ca7f2d58009ba5463
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74873


Tested-by: core-ci <typo3@b13.com>
Tested-by: Chris Müller <typo3@krue.ml>
Tested-by: Sybille Peters <sypets@gmx.de>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Chris Müller <typo3@krue.ml>
Reviewed-by: Sybille Peters <sypets@gmx.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>