[DOCS] Add links to more details for PSR-14 events in EXT:felogin

Resolves: #100214
Releases: main, 11.5
Change-Id: Ibf89953203e55e425de533a34a123ab2401fd086
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78061


Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Stefan Bürk <stefan@buerk.tech>