Deprecate book_wash_f methods with exception messages

- Added deprecation exceptions in `beforeSave` to guide users to the new booking page and updated booking object usage.

services/nginx/app/modules/forms/objects/book_wash_f.php

@@ -41,6 +41,7 @@ class book_wash_f extends form_helper_c
      */
     public function beforeSave(): void
     {
+        throw new \Exception('Deprecated: Please refresh the page, and use the new booking page instead.');
         // Set the department id to the department id of the user
         self::setDepartmentId(self::getSanitizedData('department_id'));
         // Set the customer number to the customer number of the user
@@ -61,6 +62,7 @@ class book_wash_f extends form_helper_c
         $department = (new departments_o())->selectId((int)self::getSanitizedData('department_id'));
         $department->getObjectProperties();
         // Get the bookings_new object
+        throw new \Exception('Deprecated: Use bookings_o instead of bookings_new_o');
         $bookings = new bookings_o();
         // Check if the wash type contains the interior wash
         $wants_wash_certificate = (bool)self::getSanitizedData('wants_wash_certificate');