feat: Migrate to uv for package management

[Yvictor]

📦 Summary

This PR migrates the project from pip to uv for modern, fast package management.

🚀 Changes

Package Management Migration

• ✅ Added pyproject.toml with complete project metadata
• ✅ Generated uv.lock for reproducible dependency resolution
• ✅ Removed requirements.txt (dependencies now in pyproject.toml)
• ✅ Added .python-version to .gitignore

Documentation Updates

• ✅ Updated README.md with simplified uv commands
• ✅ Updated README_CN.md with simplified uv commands
• ✅ Removed pip installation instructions
• ✅ Simplified all run commands (e.g., uv run main.py instead of cd dir && python script.py)

Script Updates

• ✅ Updated data/get_daily_price.py for uv compatibility
• ✅ Updated data/get_interdaily_price.py for uv compatibility

💡 Benefits

1. 10-100x Faster: uv is significantly faster than pip
2. Unified Management: Single tool for Python versions, virtual environments, and packages
3. Reproducible: uv.lock ensures consistent dependencies across all environments
4. Modern: PEP-compliant pyproject.toml standard
5. Simplified Commands: Direct script execution without changing directories

📝 New Workflow

# Install dependencies
uv sync

# Run scripts (simplified)
uv run main.py
uv run data/get_daily_price.py
uv run agent_tools/start_mcp_services.py

# Manage dependencies
uv add package-name
uv remove package-name

🧪 Testing

All packages have been successfully installed and tested:

• ✅ langchain==1.0.2
• ✅ langchain-openai==1.0.1
• ✅ langchain-mcp-adapters>=0.1.0
• ✅ fastmcp==2.12.5

Total: 85 packages installed and resolved.

🔗 References

• uv Official Documentation
• pyproject.toml PEP 621

[yefangyong]

That's great! Just when I had this idea and was about to start developing it, I found someone had already submitted a PR an hour earlier. 😂