docs: TSDoc + reference of fulfillment service (#5761)

www/apps/docs/content/references/services/classes/DraftOrder.mdx

@@ -8,14 +8,14 @@ import ParameterTypes from "@site/src/components/ParameterTypes"
 
 A draft order is created by an admin without direct involvement of the customer. Once its payment is marked as captured, it is transformed into an order.
 
-## Constructors
-
-#### constructor
+## constructor
 
 `**new DraftOrder**()`
 
 A draft order is created by an admin without direct involvement of the customer. Once its payment is marked as captured, it is transformed into an order.
 
+___
+
 ## Properties
 
 <ParameterTypes parameters={[
@@ -147,13 +147,15 @@ A draft order is created by an admin without direct involvement of the customer.
   }
 ]} />
 
+___
+
 ## Methods
 
-#### beforeInsert
+### beforeInsert
 
 `Private **beforeInsert**(): Promise&#60;void&#62;`
 
-##### Returns
+#### Returns
 
 Promise&#60;void&#62;