[feature] Add example integration for Qwen-Deep-Research model

[denverdino]

📝 PR Type

• Add new sample
• Update existing sample
• Add new test cases
• Fix test failures
• Documentation/Configuration update

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📚 Description

Add example agent for Qwen-Deep-Research model from Bailian platform to lower the barrier for adoption

https://www.alibabacloud.com/help/zh/model-studio/qwen-deep-research

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🧪 Testing Validation

1. How to run the added/modified test cases?

N/A

2. Is integration testing with agentscope required?

Yes

4. Has code been formatted (e.g., pre-commit)?]

Yes

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✅ Checklist

Please complete the following checks before submitting the PR:

• [Y] All sample code has been formatted with pre-commit run --all-files
• [Y] All new/modified test cases have passed (run pytest tests/)
• Test coverage has not decreased (if applicable)
• [Y] Sample code follows agentscope best practices (e.g., config management, logging)
• [Y] Related documentation in agentscope-samples has been updated (e.g., README.md)

[cla-assistant]

All committers have signed the CLA.

[Copilot]

Pull request overview

This PR adds a new example integration for the Qwen-Deep-Research model from Alibaba Cloud's Bailian platform. The example demonstrates a simplified deep research agent that performs a two-step research process: first asking clarifying questions, then executing the full research workflow with web search capabilities.

Key Changes

• New QwenDeepResearchAgent class implementing async research capabilities with streaming responses
• Integration with DashScope API for accessing the Qwen-Deep-Research model
• Two-phase research workflow: clarification followed by deep research with web search

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
deep_research/agent_qwen_deep_research/requirements.txt	Specifies agentscope dependency version requirement
deep_research/agent_qwen_deep_research/qwen_deep_research_agent.py	Core agent implementation with async API calls and streaming response processing
deep_research/agent_qwen_deep_research/main.py	Example usage demonstrating the two-step research workflow
deep_research/agent_qwen_deep_research/README.md	Documentation for setup and usage
README.md	Added table entry for new example
README_zh.md	Added Chinese table entry for new example

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