feat: add two- and four-weekly series and drop the weekday picker

src/Controller/BookingController.php

@@ -132,7 +132,7 @@ final class BookingController extends AbstractController
         ]);
         // The day and any recurrence belong to the original booking; only the span is editable
         // here, so a series is never silently rewritten by editing one of its occurrences.
-        $form->remove('date')->remove('repeat')->remove('weekdays')->remove('until');
+        $form->remove('date')->remove('repeat')->remove('until');
         $form->handleRequest($request);
 
         if ($form->isSubmitted() && $form->isValid()) {
@@ -207,7 +207,6 @@ final class BookingController extends AbstractController
             $data->date,
             $data->until,
             $data->timeRange(),
-            $data->weekdays,
         ));
     }