[FEATURE] Enhance samples interaction with Dubbo-java

[Alanxtl]

✅ 验证清单

• [x] 🔍 我已经搜索过 现有 Issues，确信这不是重复请求
• [x] 📋 我已经查看了 发布说明，确信此功能尚未实现

🎯 功能描述

• [x] @MrSibe async
• [ ] @HGD-coder config_center
• [x] @Chen-BUPT helloworld
• [x] @Chen-BUPT direct
• [ ] @nanjiek registry
  • [ ] rpc/dubbo
  • [ ] rpc/grpc
  • [ ] rpc/jsonrpc
  • [ ] rpc/triple
• [x] @Chen-BUPT streaming
• [ ] @CAICAIIs tls
• [x] @yxrxy generic

How

参考 helloworld 示例为剩下的 samples 编写与 dubbo-java 的通信示例 https://github.com/apache/dubbo-go-samples