chore(): Reorganize modules (#7210)

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

packages/modules/order/src/services/order-service.ts

@@ -0,0 +1,58 @@
+import {
+  Context,
+  DAL,
+  FindConfig,
+  OrderTypes,
+  RepositoryService,
+} from "@medusajs/types"
+import {
+  InjectManager,
+  MedusaContext,
+  MedusaError,
+  ModulesSdkUtils,
+} from "@medusajs/utils"
+import { Order } from "@models"
+
+type InjectedDependencies = {
+  orderRepository: DAL.RepositoryService
+}
+
+export default class OrderService<
+  TEntity extends Order = Order
+> extends ModulesSdkUtils.internalModuleServiceFactory<InjectedDependencies>(
+  Order
+)<TEntity> {
+  protected readonly orderRepository_: RepositoryService<TEntity>
+
+  constructor(container: InjectedDependencies) {
+    // @ts-ignore
+    super(...arguments)
+    this.orderRepository_ = container.orderRepository
+  }
+
+  @InjectManager("orderRepository_")
+  async retrieveOrderVersion<TEntityMethod = OrderTypes.OrderDTO>(
+    id: string,
+    version: number,
+    config: FindConfig<TEntityMethod> = {},
+    @MedusaContext() sharedContext: Context = {}
+  ): Promise<TEntity> {
+    const queryConfig = ModulesSdkUtils.buildQuery<TEntity>(
+      { id, items: { version } },
+      { ...config, take: 1 }
+    )
+    const [result] = await this.orderRepository_.find(
+      queryConfig,
+      sharedContext
+    )
+
+    if (!result) {
+      throw new MedusaError(
+        MedusaError.Types.NOT_FOUND,
+        `Order with id: "${id}" and version: "${version}" not found`
+      )
+    }
+
+    return result
+  }
+}