chore(): Reorganize modules (#7210)

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

packages/modules/order/src/models/shipping-method-adjustment.ts

@@ -0,0 +1,42 @@
+import {
+  createPsqlIndexStatementHelper,
+  generateEntityId,
+} from "@medusajs/utils"
+import { BeforeCreate, Entity, ManyToOne, OnInit } from "@mikro-orm/core"
+import AdjustmentLine from "./adjustment-line"
+import ShippingMethod from "./shipping-method"
+
+const ShippingMethodIdIdIndex = createPsqlIndexStatementHelper({
+  tableName: "order_shipping_method_adjustment",
+  columns: "shipping_method_id",
+})
+
+@Entity({ tableName: "order_shipping_method_adjustment" })
+export default class ShippingMethodAdjustment extends AdjustmentLine {
+  @ManyToOne(() => ShippingMethod, {
+    persist: false,
+  })
+  shipping_method: ShippingMethod
+
+  @ManyToOne({
+    entity: () => ShippingMethod,
+    columnType: "text",
+    fieldName: "shipping_method_id",
+    mapToPk: true,
+    onDelete: "cascade",
+  })
+  @ShippingMethodIdIdIndex.MikroORMIndex()
+  shipping_method_id: string
+
+  @BeforeCreate()
+  onCreate() {
+    this.id = generateEntityId(this.id, "ordsmadj")
+    this.shipping_method_id ??= this.shipping_method?.id
+  }
+
+  @OnInit()
+  onInit() {
+    this.id = generateEntityId(this.id, "ordsmadj")
+    this.shipping_method_id ??= this.shipping_method?.id
+  }
+}