Feature: #79626 - Integrate record link handler 

Description 

The functionality of EXT:linkhandler has been integrated into the core. It enables editors to link to single records.

The configuration consists of the following parts:

PageTsConfig is used to create a new tab in the LinkBrowser to be able to select records:

TCEMAIN.linkHandler.anIdentifier {
    handler = TYPO3\CMS\Recordlist\LinkHandler\RecordLinkHandler
    label = LLL:EXT:extension/Resources/Private/Language/locallang.xlf:link.customTab
    configuration {
        table = tx_example_domain_model_item
    }
    scanBefore = page
}

The following optional configuration is available:

• configuration.hidePageTree = 1: Hide the page tree in the link browser
• configuration.storagePid = 1: Let the link browser start with the given page
• configuration.pageTreeMountPoints = 123,456: Mount the given pages instead of the regular page tree

You can position your own handlers in order as defined in https://docs.typo3.org/typo3cms/extensions/core/latest/Changelog/7.6/Feature-66369-AddedLinkBrowserAPIs.html

TypoScript is used to generate the actual link in the frontend

config.recordLinks.anIdentifier {
    // Do not force link generation when the record is hidden
    forceLink = 0

    typolink {
        parameter = 123
        additionalParams.data = field:uid
        additionalParams.wrap = &tx_example_pi1[item]=|&tx_example_pi1[controller]=Item&tx_example_pi1[action]=show
        useCacheHash = 1
    }
}