Feature: #90249 - New PSR-14 events for existing package-related Signal Slots

See forge#90249

Description

PSR-14-based event dispatching allows for TYPO3 extensions or PHP packages to extend TYPO3 Core functionality in an exchangeable way.

The following new PSR-14 events have been introduced:

• TYPO3\CMS\Core\Package\Event\PackagesMayHaveChangedEvent

• TYPO3\CMS\Core\Package\Event\AfterPackageActivationEvent

• TYPO3\CMS\Core\Package\Event\AfterPackageDeactivationEvent

• TYPO3\CMS\Core\Package\Event\BeforePackageActivationEvent

• TYPO3\CMS\Extensionmanager\Event\AfterExtensionDatabaseContentHasBeenImportedEvent

• TYPO3\CMS\Extensionmanager\Event\AfterExtensionStaticDatabaseContentHasBeenImportedEvent

• TYPO3\CMS\Extensionmanager\Event\AfterExtensionFilesHaveBeenImportedEvent

• TYPO3\CMS\Extensionmanager\Event\AvailableActionsForExtensionEvent

They replace the existing Extbase-based Signal Slots:

• PackageManagement::packagesMayHaveChanged

• TYPO3\CMS\Extensionmanager\Utility\InstallUtility::afterExtensionInstall

• TYPO3\CMS\Extensionmanager\Utility\InstallUtility::afterExtensionUninstall

• TYPO3\CMS\Extensionmanager\Utility\InstallUtility::afterExtensionT3DImport

• TYPO3\CMS\Extensionmanager\Utility\InstallUtility::afterExtensionStaticSqlImport

• TYPO3\CMS\Extensionmanager\Utility\InstallUtility::afterExtensionFileImport

• TYPO3\CMS\Extensionmanager\Service\ExtensionManagementService::willInstallExtensions

• TYPO3\CMS\Extensionmanager\ViewHelper\ProcessAvailableActionsViewHelper::processActions

Impact

It is now possible to add listeners to the new PSR-14 Events which define a clear API what can be read or modified.

The listeners can be added to the Configuration/Services.yaml as it is done in TYPO3's shipped extensions as well.