chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

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

@@ -0,0 +1,11 @@
+---
+displayed_sidebar: promotionReference
+---
+
+import { TypeList } from "docs-ui"
+
+# ComputeActionAdjustmentLine
+
+An action's adjustment line.
+
+<TypeList types={[{"name":"id","type":"`string`","description":"The ID of the compute action's adjustment line.","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"code","type":"`string`","description":"The promotion's code.","optional":false,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="ComputeActionAdjustmentLine"/>