chore(): Reorganize modules (#7210)

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

packages/modules/payment/integration-tests/__tests__/loaders/providers.spec.ts

@@ -0,0 +1,76 @@
+import { IPaymentModuleService } from "@medusajs/types"
+import { SqlEntityManager } from "@mikro-orm/postgresql"
+
+import { Modules } from "@medusajs/modules-sdk"
+import { initModules } from "medusa-test-utils"
+import { MikroOrmWrapper } from "../../utils"
+import { getInitModuleConfig } from "../../utils/get-init-module-config"
+import { createPaymentCollections } from "../../__fixtures__"
+
+jest.setTimeout(30000)
+
+describe("Payment Module Service", () => {
+  let service: IPaymentModuleService
+  let repositoryManager: SqlEntityManager
+  let shutdownFunc: () => Promise<void>
+
+  beforeAll(async () => {
+    await MikroOrmWrapper.setupDatabase()
+
+    const initModulesConfig = getInitModuleConfig()
+    const { medusaApp, shutdown } = await initModules(initModulesConfig)
+    service = medusaApp.modules[Modules.PAYMENT]
+
+    shutdownFunc = shutdown
+  })
+
+  afterAll(async () => {
+    await shutdownFunc()
+  })
+
+  beforeEach(async () => {
+    await MikroOrmWrapper.setupDatabase()
+    repositoryManager = await MikroOrmWrapper.forkManager()
+
+    await createPaymentCollections(repositoryManager)
+  })
+
+  afterEach(async () => {
+    await MikroOrmWrapper.clearDatabase()
+  })
+
+  describe("providers", () => {
+    it("should load payment plugins", async () => {
+      let error = await service
+        .createPaymentCollections([
+          {
+            amount: 200,
+            region_id: "req_123",
+          } as any,
+        ])
+        .catch((e) => e)
+
+      expect(error.message).toContain(
+        "Value for PaymentCollection.currency_code is required, 'undefined' found"
+      )
+    })
+
+    it("should create a payment collection successfully", async () => {
+      const [createdPaymentCollection] = await service.createPaymentCollections(
+        [{ currency_code: "USD", amount: 200, region_id: "reg_123" }]
+      )
+
+      expect(createdPaymentCollection).toEqual(
+        expect.objectContaining({
+          id: expect.any(String),
+          status: "not_paid",
+          payment_providers: [],
+          payment_sessions: [],
+          payments: [],
+          currency_code: "USD",
+          amount: 200,
+        })
+      )
+    })
+  })
+})