[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\SgNews\Domain\Model\News::class => [
+		'tableName' => 'pages',
+		'recordType' => \SGalinski\SgNews\Domain\Model\News::DOK_TYPE_NEWS,
+		'properties' => [
+			'highlighted' => [
+				'fieldName' => 'tx_sgnews_highlighted'
+			],
+			'neverHighlighted' => [
+				'fieldName' => 'tx_sgnews_never_highlighted'
+			],
+			'relatedNews' => [
+				'fieldName' => 'tx_sgnews_related_news'
+			],
+			'newsAuthor' => [
+				'fieldName' => 'tx_sgnews_news_author'
+			],
+			'lastUpdated' => [
+				'fieldName' => 'lastUpdated'
+			],
+			'creationDate' => [
+				'fieldName' => 'crdate'
+			],
+			'teaser1Image' => [
+				'fieldName' => 'tx_sgnews_teaser1_image'
+			],
+			'teaser2Image' => [
+				'fieldName' => 'tx_sgnews_teaser2_image'
+			],
+			'tags' => [
+				'fieldName' => 'tx_sgnews_tags'
+			],
+			'likes' => [
+				'fieldName' => 'tx_sgnews_likes'
+			],
+			'contentFromAnotherPage' => [
+				'fieldName' => 'tx_sgnews_content_from_another_page'
+			],
+			'location' => [
+				'fieldName' => 'tx_sgnews_location'
+			],
+			'dateEnd' => [
+				'fieldName' => 'tx_sgnews_date_end'
+			]
+		]
+	],
+	\SGalinski\SgNews\Domain\Model\Category::class => [
+		'tableName' => 'pages',
+		'recordType' => \SGalinski\SgNews\Domain\Model\Category::DOK_TYPE_CATEGORY,
+		'properties' => [
+			'teaser1Image' => [
+				'fieldName' => 'tx_sgnews_teaser1_image'
+			],
+			'teaser2Image' => [
+				'fieldName' => 'tx_sgnews_teaser2_image'
+			]
+		]
+	],
+	\SGalinski\SgNews\Domain\Model\Tag::class => [
+		'tableName' => 'sys_category'
+	],
+	\SGalinski\SgNews\Domain\Model\FileReference::class => [
+		'tableName' => 'sys_file_reference'
+	]
+];

Configuration/TypoScript/Common/setup.typoscript

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