Feature: TYPO3 v14 support 

Description 

Version 2.0 runs on TYPO3 v14.3 alongside v13.4, from one code base, on PHP 8.2 up to 8.5.

Nothing about a seed set changes. The set descriptor, the scenario format, the two commands and every one of their exit codes are the same on both core versions, so a set written for v13.4 imports unchanged on v14.3.

Impact 

No part of the implementation differs between the two core versions: v13.4 and v14.3 run the same classes. The mechanism for a difference is in place - a Core13/ and a Core14/ directory, of which the dependency injection container registers only the one matching the running installation - and both are currently empty. None of that is visible in a seed set, or to anything calling the commands.