[TASK] Relocated extbase persistence configuration to new Classes.php

Configuration/Extbase/Persistence/Classes.php

+<?php
+declare(strict_types=1);
+
+// if you need to change this, keep in mind the changes need to be done in
+// Configuration/TypoScript/Common/setup.typoscript for TYPO3 9, too
+return [
+	\SGalinski\SgJobs\Domain\Model\FileReference::class => [
+		'tableName' => 'sys_file_reference'
+	],
+	\SGalinski\SgJobs\Domain\Model\JobApplication::class => [
+		'tableName' => 'tx_sgjobs_domain_model_job_application'
+	],
+	\SGalinski\SgJobs\Domain\Model\ExperienceLevel::class => [
+		'tableName' => 'tx_sgjobs_domain_model_experience_level'
+	]
+];

Configuration/TypoScript/Common/setup.typoscript

 config.tx_extbase {
 	persistence {
+		# @deprecated This configuration does not work in TYPO3 10 at all, you need to also change
+		# Configuration/Extbase/Persistence/Classes.php
 		classes {
 			SGalinski\SgJobs\Domain\Model\FileReference {
 				mapping {