Added:
- Registration of additional properties by implementing AdditionalPropertiesInterface
  see: https://docs.typo3.org/p/brotkrueml/schema/3.10/en-us/Developer/ExtendingVocabulary.htmlregister-additional-properties

Deprecated:
- PSR-14 event RegisterAdditionalTypePropertiesEvent
  see: https://docs.typo3.org/p/brotkrueml/schema/3.10/en-us/Developer/Deprecations.htmlconfval-psr-14-event-registeradditionaltypepropertiesevent

Fixed:
- Additional properties cache is not cleared when flushing the cache