chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/apps/resources/app/commerce-modules/tax/module-options/page.mdx

@@ -0,0 +1,43 @@
+---
+sidebar_label: "Module Options"
+---
+
+import { Table } from "docs-ui"
+
+export const metadata = {
+  title: `Tax Module Options`,
+}
+
+# {metadata.title}
+
+In this document, you'll learn about the options of the Tax Module.
+
+## providers
+
+The `providers` option is an array of either tax provider modules, tax plugins, or path to a file that defines a tax provider.
+
+When the Medusa application starts, these providers are registered and can be used to retrieve tax lines.
+
+```js title="medusa-config.js"
+const modules = {
+  // ...
+  tax: {
+    resolve: "@medusajs/tax",
+    options: {
+      providers: [
+        {
+          resolve: "my-provider",
+          options: {
+            // ...
+          },
+        },
+      ],
+    },
+  },
+}
+```
+
+The objects in the array accept the following properties:
+
+- `resolve`: A string indicating the package name of the tax provider module or the tax plugin, or the path to the file defining the tax provider.
+- `options`: An object of options to pass to the tax provider.