www/typo3-12: New port, copied from www/typo3-11

The latest version with Long Term Support (LTS). It will have full support until
31 October 2024 and security bugfixes until 30 April 2026.

* Unified editor experience
* Advanced filelist module
* Sharable Deep Links in the TYPO3 Backend
* Improved collaboration and Workflow features
* Flexible and Secure Multi-factor Authentication
* And a lot of Improvements for Developers
PR:		268127
Reported by:	wen@
Approved by:	maintainer