chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/apps/resources/app/commerce-modules/customer/examples/page.mdx

@@ -0,0 +1,236 @@
+import { CodeTabs, CodeTab } from "docs-ui"
+
+export const metadata = {
+  title: `Examples of the Customer Module`,
+}
+
+# {metadata.title}
+
+In this guide, you’ll find common examples of how you can use the Customer Module in your application.
+
+## Create a Customer
+
+<CodeTabs groupId="app-type">
+  <CodeTab label="Medusa API Router" value="medusa">
+
+  ```ts
+  import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
+  import { ICustomerModuleService } from "@medusajs/types"
+  import { ModuleRegistrationName } from "@medusajs/modules-sdk"
+
+  export async function POST(
+    request: MedusaRequest,
+    res: MedusaResponse
+  ) {
+    const customerModuleService: ICustomerModuleService =
+      request.scope.resolve(ModuleRegistrationName.CUSTOMER)
+
+    const customer = await customerModuleService.create({
+      first_name: "Peter",
+      last_name: "Hayes",
+      email: "peter.hayes@example.com",
+    })
+
+    res.json({
+      customer,
+    })
+  }
+  ```
+
+  </CodeTab>
+  <CodeTab label="Next.js App Router" value="nextjs">
+
+  ```ts
+  import { NextResponse } from "next/server"
+
+  import {
+    initialize as initializeCustomerModule,
+  } from "@medusajs/customer"
+
+  export async function POST(request: Request) {
+    const customerModuleService = await initializeCustomerModule()
+
+    const customer = await customerModuleService.create({
+      first_name: "Peter",
+      last_name: "Hayes",
+      email: "peter.hayes@example.com",
+    })
+
+    return NextResponse.json({
+      customer,
+    })
+  }
+  ```
+
+  </CodeTab>
+</CodeTabs>
+
+---
+
+## Create a Customer Group
+
+<CodeTabs groupId="app-type">
+  <CodeTab label="Medusa API Router" value="medusa">
+
+  ```ts
+  import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
+  import { ICustomerModuleService } from "@medusajs/types"
+  import { ModuleRegistrationName } from "@medusajs/modules-sdk"
+
+  export async function POST(
+    request: MedusaRequest,
+    res: MedusaResponse
+  ) {
+    const customerModuleService: ICustomerModuleService =
+      request.scope.resolve(ModuleRegistrationName.CUSTOMER)
+
+    const customerGroup =
+      await customerModuleService.createCustomerGroup({
+        name: "VIP",
+      })
+
+    res.json({
+      customer_group: customerGroup,
+    })
+  }
+  ```
+
+  </CodeTab>
+  <CodeTab label="Next.js App Router" value="nextjs">
+
+  ```ts
+  import { NextResponse } from "next/server"
+
+  import {
+    initialize as initializeCustomerModule,
+  } from "@medusajs/customer"
+
+  export async function POST(request: Request) {
+    const customerModuleService = await initializeCustomerModule()
+
+    const customerGroup =
+      await customerModuleService.createCustomerGroup({
+        name: "VIP",
+      })
+
+    return NextResponse.json({
+      customer_group: customerGroup,
+    })
+  }
+  ```
+
+  </CodeTab>
+</CodeTabs>
+
+---
+
+## Add a Customer to a Group
+
+<CodeTabs groupId="app-type">
+  <CodeTab label="Medusa API Router" value="medusa">
+
+  ```ts
+  import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
+  import { ICustomerModuleService } from "@medusajs/types"
+  import { ModuleRegistrationName } from "@medusajs/modules-sdk"
+
+  export async function POST(
+    request: MedusaRequest,
+    res: MedusaResponse
+  ) {
+    const customerModuleService: ICustomerModuleService =
+      request.scope.resolve(ModuleRegistrationName.CUSTOMER)
+
+    await customerModuleService.addCustomerToGroup({
+      customer_id: "cus_123",
+      customer_group_id: "cusgroup_123",
+    })
+
+    res.status(200)
+  }
+  ```
+
+  </CodeTab>
+  <CodeTab label="Next.js App Router" value="nextjs">
+
+  ```ts
+  import { NextResponse } from "next/server"
+
+  import {
+    initialize as initializeCustomerModule,
+  } from "@medusajs/customer"
+
+  export async function POST(request: Request) {
+    const customerModuleService = await initializeCustomerModule()
+
+    await customerModuleService.addCustomerToGroup({
+      customer_id: "cus_123",
+      customer_group_id: "cusgroup_123",
+    })
+
+    return NextResponse.json({}, { status: 200 })
+  }
+  ```
+
+  </CodeTab>
+</CodeTabs>
+
+---
+
+## Remove a Customer from a Group
+
+<CodeTabs groupId="app-type">
+  <CodeTab label="Medusa API Router" value="medusa">
+
+  ```ts
+  import { MedusaRequest, MedusaResponse } from "@medusajs/medusa"
+  import { ICustomerModuleService } from "@medusajs/types"
+  import { ModuleRegistrationName } from "@medusajs/modules-sdk"
+
+  export async function POST(
+    request: MedusaRequest,
+    res: MedusaResponse
+  ) {
+    const customerModuleService: ICustomerModuleService =
+      request.scope.resolve(ModuleRegistrationName.CUSTOMER)
+
+    await customerModuleService.removeCustomerFromGroup({
+      customer_id: "cus_123",
+      customer_group_id: "cusgroup_123",
+    })
+
+    res.status(200)
+  }
+  ```
+
+  </CodeTab>
+  <CodeTab label="Next.js App Router" value="nextjs">
+
+  ```ts
+  import { NextResponse } from "next/server"
+
+  // eslint-disable-next-line prettier/prettier
+  import {
+    initialize as initializeCustomerModule,
+  } from "@medusajs/customer"
+
+  export async function POST(request: Request) {
+    const customerModuleService = await initializeCustomerModule()
+
+    await customerModuleService.removeCustomerFromGroup({
+      customer_id: "cus_123",
+      customer_group_id: "cusgroup_123",
+    })
+
+    return NextResponse.json({}, { status: 200 })
+  }
+  ```
+
+  </CodeTab>
+</CodeTabs>
+
+---
+
+## More Examples
+
+The [module interface reference](/references/customer) provides a reference to all the methods available for use with examples for each.