chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/apps/resources/references/tax/interfaces/tax.CreateTaxRateRuleDTO/page.mdx

@@ -0,0 +1,11 @@
+---
+displayed_sidebar: taxReference
+---
+
+import { TypeList } from "docs-ui"
+
+# CreateTaxRateRuleDTO
+
+The tax rate rule to be created.
+
+<TypeList types={[{"name":"reference","type":"`string`","description":"The snake-case name of the data model that the tax rule references.\nFor example, `product`.\n\nLearn more in [this guide](https://docs.medusajs.com/experimental/tax/tax-rates-and-rules/#what-are-tax-rules).","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"reference_id","type":"`string`","description":"The ID of the record of the data model that the tax rule references.\nFor example, `prod_123`.\n\nLearn more in [this guide](https://docs.medusajs.com/experimental/tax/tax-rates-and-rules/#what-are-tax-rules).","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"tax_rate_id","type":"`string`","description":"The associated tax rate's ID.","optional":false,"defaultValue":"","expandable":false,"children":[]},{"name":"metadata","type":"`Record<string, unknown>`","description":"Holds custom data in key-value pairs.","optional":true,"defaultValue":"","expandable":false,"children":[]},{"name":"created_by","type":"`null` \\| `string`","description":"Who created the tax rate rule. For example, the ID of the\nuser that created it.","optional":true,"defaultValue":"","expandable":false,"children":[]}]}  sectionTitle="CreateTaxRateRuleDTO"/>