feat: trigger loading states immediately upon navigation

apps/scandic-web/app/[lang]/(live)/@bookingwidget/hotelreservation/[...paths]/loading.tsx

@@ -0,0 +1,11 @@
+import { BookingWidgetSkeleton } from "@/components/BookingWidget/Client"
+
+// This file is crucial for displaying a loading
+// state immediately in the booking flow.
+// Next doesn't recognize manually added Suspense
+// boundaries during page navigation (Server->Client)
+// thus making it seem as the page is frozen during
+// the time it takes for `BookingWidget` to resolve.
+export default function BookingWidgetLoading() {
+  return <BookingWidgetSkeleton />
+}