feat: 初始化居家上门服务系统完整项目代码

- Spring Boot 后端服务 (hss-home-service)
- delivery-miniapp 配送小程序
- website 官网 (Nuxt)
- docs 架构设计文档
- Docker 容器化部署配置

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

hss-home-service/website/server/api/lead.post.ts

@@ -0,0 +1,11 @@
+export default defineEventHandler(async (event) => {
+  const body = await readBody(event)
+  console.log('[mock] lead received:', JSON.stringify(body))
+  return {
+    code: 200,
+    message: 'success',
+    data: { id: Date.now() },
+    requestId: 'mock-' + Date.now(),
+    timestamp: Date.now()
+  }
+})