[Feature Request] Add Support for Alibaba Cloud Bailian Agent API in Java Runtime

### Description

Alibaba Cloud's **Bailian** platform provides a powerful set of APIs for building and deploying AI agents, including LLM orchestration, tool calling, and more. The Bailian Agent API is becoming a key infrastructure for enterprise-grade agent applications in the Alibaba ecosystem.

To enhance interoperability and enable users to deploy AgentScope-based agents on Bailian, we propose adding **native support for the Bailian Agent API** in agentscope-runtime-java

This would allow Java-based agents to seamlessly integrate with Bailian’s agent execution environment

### Proposed Integration Points

1. **Bailian Agent SDK Adapter**: Implement a Java adapter that conforms to AgentScope’s agent interface while delegating to Bailian’s API.

### Benefits

- Enables agents to interact with agent api
- Reduces boilerplate for enterprise users already using Bailian
- Promotes ecosystem synergy between AgentScope and Alibaba Cloud AI services

### References

- Bailian Official Documentation
- Bailian Agent API specs

### Additional Notes

The Java implementation should aim for **API consistency** to ensure cross-language portability of agent definitions.