docs: integrate shipstation guide (#10623)

* first draft

* finalized first draft + added link to sidebar

* fix lint errors

* type changes

* updates to createFulfillment

* updates

* more updates

* add package weight

* added note about package

* fix up order items fulfillment

* add meta image

* address comment

www/apps/resources/app/recipes/digital-products/examples/standard/page.mdx

@@ -172,7 +172,7 @@ const DigitalProductOrder = model.define("digital_product_order", {
   status: model.enum(OrderStatus),
   products: model.manyToMany(() => DigitalProduct, {
     mappedBy: "orders",
-    pivotTable: "digitalproduct_digitalproductorders"
+    pivotTable: "digitalproduct_digitalproductorders",
   }),
 })