chore(): Reorganize modules (#7210)

**What**
Move all modules to the modules directory

packages/modules/cart/integration-tests/__fixtures__/cart/data.ts

@@ -0,0 +1,23 @@
+export const defaultCartsData = [
+  {
+    id: "cart-id-1",
+    region_id: "region-id-1",
+    customer_id: "customer-id-1",
+    email: "test@email.com",
+    currency_code: "usd",
+  },
+  {
+    id: "cart-id-2",
+    region_id: "region-id-1",
+    customer_id: "customer-id-1",
+    shipping_address: {
+      first_name: "Tony",
+      last_name: "Stark",
+    },
+    billing_address: {
+      address_1: "Stark Industries",
+      city: "New York",
+    },
+    currency_code: "usd",
+  },
+]

packages/modules/cart/integration-tests/__fixtures__/cart/index.ts

@@ -0,0 +1,21 @@
+import { CreateCartDTO } from "@medusajs/types"
+import { SqlEntityManager } from "@mikro-orm/postgresql"
+import { Cart } from "../../../src/models"
+import { defaultCartsData } from "./data"
+
+export * from "./data"
+
+export async function createCarts(
+  manager: SqlEntityManager,
+  cartsData: CreateCartDTO[] = defaultCartsData
+): Promise<Cart[]> {
+  const carts: Cart[] = []
+
+  for (let cartData of cartsData) {
+    let cart = manager.create(Cart, cartData)
+
+    await manager.persistAndFlush(cart)
+  }
+
+  return carts
+}