feat(blocked_slots): add blocked slots

src/app/(main)/blocked_slots/[slotId]/page.tsx

@@ -1,9 +1,10 @@
 import BlockedSlotForm from '@/components/forms/blocked-slot-form';
 
-export default function NewBlockedSlotPage({
+export default async function NewBlockedSlotPage({
   params,
 }: {
-  params: { slotId?: string };
+  params: Promise<{ slotId?: string }>;
 }) {
-  return <BlockedSlotForm existingBlockedSlotId={params.slotId} />;
+  const resolvedParams = await params;
+  return <BlockedSlotForm existingBlockedSlotId={resolvedParams.slotId} />;
 }