chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/apps/resources/references/promotion/interfaces/promotion.RemoveShippingMethodAdjustment/page.mdx

@@ -0,0 +1,11 @@
+---
+displayed_sidebar: promotionReference
+---
+
+import { TypeList } from "docs-ui"
+
+# RemoveShippingMethodAdjustment
+
+This action indicates that an adjustment must be removed from a shipping method. For example, remove the free shipping discount applied before.
+
+<TypeList types={[{"name":"action","type":"`\"removeShippingMethodAdjustment\"`","description":"The type of action","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"adjustment_id","type":"`string`","description":"The associated adjustment's ID.","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"code","type":"`string`","description":"The promotion's code.","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="RemoveShippingMethodAdjustment"/>