Pick images, pages, forms, sections and terms instead of typing ids and addresses

The share image and featured image of a page become image fields with the library dialog,
as do image settings of plugins. The editor offers forms, sections, categories and tags as
lists, a page search next to every link target and in text links, the redirect target has a
page search, and the form editor picks the reply field, the condition and the option images.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

templates/admin/settings.html.twig

@@ -292,9 +292,8 @@
                 <input id="from" name="from" maxlength="400" required placeholder="alte-seite">
             </div>
             <div>
-                <label for="to">Neue Adresse</label>
-                <input id="to" name="to" maxlength="400" placeholder="leistungen/webdesign">
-                <p class="field-help">Bei 410 leer lassen.</p>
+                {% include 'admin/content-picker.html.twig' with {id: 'to', name: 'to', label: 'Neue Adresse', valueKey: 'path', free: true} only %}
+                <p class="field-help">Seite suchen und wählen – oder einen anderen Pfad eintippen, etwa kategorie/projekte. Bei 410 leer lassen.</p>
             </div>
             <div>
                 <label for="status">Art</label>