[FEATURE] compatibility v12
- [FEATURE] PHP 8.1 compatibility
- [FIX] Refactor to use Symfony dependency injection + use Cookiejar
- [FIX] Replace deprecated GeneralUtility::getUrl() by RequestFactory
- [FIX] Require PHP 8.x
- [FIX] More syntax fix, redundant fully qualified namespaces
- [FIX] Remove redundant object return types
- [FIX] Revert wrong body field replacement
- [FIX] wrong body field replacement
- [FIX] menu item display in grid
- [TASK] v11 compatibility follow-up
- [BUGFIX] Require michelf/php-markdown in composer.json