feat(invoice): 添加创建发票功能

- 新增 CreateInvoiceCmd 类作为创建发票的命令对象
- 创建 Address 类表示发票地址信息
- 实现 Invoice 类作为发票的领域模型
- 添加 InvoiceRepoInterface 接口和 InvoiceRepo 实现类，用于处理发票创建逻辑
- 编写 CreateInvoiceTest测试用例验证发票创建功能

tests/Feature/Invoice/CreateInvoiceTest.php

@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * CreateInvoiceTest.php@Pay
+ *
+ * @author 李东云 <Dongyun.Li@LuxCreo.Ai>
+ * Powered by PhpStorm
+ * Created on 2025/8/29
+ */
+
+use Singularity\HDK\Pay\Application\Command\CreateInvoiceCmd;
+use Singularity\HDK\Pay\Domain\Invoice\Aggregate\Invoice;
+use Singularity\HDK\Pay\Infrastructure\Repository\InvoiceRepo;
+
+use function Hyperf\Support\make;
+
+it('should can create invoice', function () {
+    $repo = make(InvoiceRepo::class);
+
+    $invoice = $repo->create(
+        new CreateInvoiceCmd(
+            uid: '61dbe752d4caa',
+            caseId: '68affb136c01d',
+            setFreqInvAddr: true,
+            receiver: "dongyun.li@luxcreo.ai",
+            patientName: "Ms. Jennifer Durgan",
+            address: "12345 Magnolia Boulevard Northeast，Apartment 5678， Suite 910",
+            city: "Springfield",
+            state: "Illinois",
+            country: "United States",
+            zipCode: "67890-1234",
+        ),
+    );
+
+    expect($invoice)
+        ->toBeInstanceOf(Invoice::class);
+});