Issue #3314446: CKEditor 5 compatibility

css/ImageHandler.css

insert.libraries.yml

insert.module

js/EditorInterface.js

js/EditorManager.js

js/FileHandler.js

js/FocusManager.js

js/Handler.js

js/ImageHandler.js

js/Inserter.js

js/Rotator.js

js/editors/CKEditor.js

js/editors/namespace.js

js/insert.api.js

js/insert.js

...es/insert_responsive_image/insert_responsive_image.module

templates/insert-button-widget.html.twig

templates/insert-image.html.twig

tests/src/FunctionalJavaScript/InsertImageCKEditorTest.php

.../src/FunctionalJavaScript/InsertImageCKEditorTestBase.php