Updated documentation link

[DOCS] Link extensions documentation from packagist and other tools - thanks @linawolf

TYPO3 v13 compatibility

[TASK] Remove superfluous replace in composer.json·
[TASK] Exclude PHP 8.1 for TYPO3 v13 build
[TASK] Allow TYPO3 v13 installation

Initial release for TYPO3 12.4

[TASK] Updated extension description

Signed-off-by: Torben Hansen <derhansen@gmail.com>