feat: add description field to orders and support marking menu items as sold out

prisma/schema.prisma

@@ -27,6 +27,7 @@ model User {
 model Order {
   id             String          @id @default(uuid())
   title          String
+  description    String?
   date           DateTime
   allow_custom   Boolean         @default(false)
   status         String          @default("DRAFT")
@@ -39,10 +40,11 @@ model Order {
 }
 
 model AvailableItem {
-  id       String @id @default(uuid())
-  order_id String
-  name       String
-  order      Order  @relation(fields: [order_id], references: [id], onDelete: Cascade)
+  id          String   @id @default(uuid())
+  order_id    String
+  name        String
+  is_sold_out Boolean  @default(false)
+  order       Order    @relation(fields: [order_id], references: [id], onDelete: Cascade)
   created_at DateTime @default(now())
   updated_at DateTime @updatedAt
 }