Steps necessary to integrate screenshot tool into the Core

[linawolf]

• Remove all dependencies to third party extensions
• Do not depend on a composer.lock but work with the newest available branches
• Make it work with the current main version of TYPO3
• Make it work with the current version of the testing framework
• find a solution to take screenshots of third party extensions that do not depend on changing the code of this tool directly

Steps that need to be taken from the side of the Core can be collected here: https://forge.typo3.org/issues/96620