Events to modify link handler

You may have to modify the list of available link handlers based on some dynamic value:

• ModifyAllowedItemsEvent
• ModifyLinkHandlersEvent

Another event allows you to resolve custom link types, but also to modify the link result data of existing link handlers:

• AfterLinkResolvedByStringRepresentationEvent

If you want to be compatible to both TYPO3 v13 and v12, you can keep your implementation of the $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['Link']['resolveByStringRepresentation'] and implement the event listener at the same time. Remove the hook implementation when dropping TYPO3 v12 support.