Add provided (deprecated) CEs in content element wizard in v12

To streamline experience with v13 where they are added out of the box.

Resolves: #11485

Configuration/TCA/Overrides/tt_content.php

@@ -6,12 +6,15 @@ use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
 use TYPO3\CMS\Extbase\Utility\ExtensionUtility;
 
 (function (string $extKey, string $table) {
+    $GLOBALS['TCA']['tt_content']['columns']['CType']['config']['itemGroups'][$extKey] = 'Events';
+
     /* Search Plugin */
     $pluginSignature = ExtensionUtility::registerPlugin(
         'Events',
         'DateSearch',
         'Events: Date Search',
-        'events-plugin'
+        'events-plugin',
+        $extKey
     );
     ExtensionManagementUtility::addToAllTCAtypes($table, 'pi_flexform', $pluginSignature, 'after:subheader');
     ExtensionManagementUtility::addPiFlexFormValue(
@@ -25,7 +28,8 @@ use TYPO3\CMS\Extbase\Utility\ExtensionUtility;
         'Events',
         'DateList',
         'Events: Date List',
-        'events-plugin'
+        'events-plugin',
+        $extKey
     );
     ExtensionManagementUtility::addToAllTCAtypes($table, 'pi_flexform', $pluginSignature, 'after:subheader');
     ExtensionManagementUtility::addPiFlexFormValue(
@@ -39,7 +43,8 @@ use TYPO3\CMS\Extbase\Utility\ExtensionUtility;
         'Events',
         'DateShow',
         'Events: Date Show',
-        'events-plugin'
+        'events-plugin',
+        $extKey
     );
     ExtensionManagementUtility::addToAllTCAtypes($table, 'pi_flexform', $pluginSignature, 'after:subheader');
     ExtensionManagementUtility::addPiFlexFormValue(
@@ -53,7 +58,8 @@ use TYPO3\CMS\Extbase\Utility\ExtensionUtility;
         'Events',
         'Selected',
         'Events: Show selected',
-        'events-plugin'
+        'events-plugin',
+        $extKey
     );
     ExtensionManagementUtility::addToAllTCAtypes($table, 'pi_flexform', $pluginSignature, 'after:subheader');
     ExtensionManagementUtility::addPiFlexFormValue(

Configuration/TsConfig/Page/Mod/Wizards/NewContentElement.tsconfig

@@ -0,0 +1,38 @@
+mod.wizards {
+    newContentElement.wizardItems {
+        events {
+            header = Events
+            show = *
+            elements {
+                events_datesearch {
+                    iconIdentifier = events-plugin
+                    title = Events: Date Search
+                    tt_content_defValues {
+                        CType = events_datesearch
+                    }
+                }
+                events_datelist {
+                    iconIdentifier = events-plugin
+                    title = Events: Date List
+                    tt_content_defValues {
+                        CType = events_datelist
+                    }
+                }
+                events_dateshow {
+                    iconIdentifier = events-plugin
+                    title = Events: Date Show
+                    tt_content_defValues {
+                        CType = events_dateshow
+                    }
+                }
+                events_selected {
+                    iconIdentifier = events-plugin
+                    title = Events: Show selected
+                    tt_content_defValues {
+                        CType = events_selected
+                    }
+                }
+            }
+        }
+    }
+}

Configuration/page.tsconfig

@@ -0,0 +1 @@
+@import 'EXT:events/Configuration/TsConfig/Page/Mod/Wizards/NewContentElement.tsconfig'

Documentation/Changelog/5.0.0.rst

@@ -32,4 +32,5 @@ Nothing
 Deprecation
 -----------
 
-Nothing
+* The existing content elements are deprecated.
+  We recommend to build your own dedicated content elements.

Documentation/Maintenance.rst

@@ -13,4 +13,8 @@ corresponding settings.
 That way the import can provide all the necessary information and can be passed down
 to all classes.
 
+Remove no longer needed TSConfig
+--------------------------------
 
+We currently have `Configuration/page.tsconfig` and `Configuration/TsConfig/`.
+Both can be removed once we drop v12 support.