Added Shopping Partner Agent

[monali7-d]

Description

Added shopping partner agent to showcase real world use case of phidata

Type of change

Please check the options that are relevant:

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Model update
• [ ] Infrastructure change

Checklist

• [ ] My code follows Phidata's style guidelines and best practices
• [ ] I have performed a self-review of my code
• [ ] I have added docstrings and comments for complex logic
• [ ] My changes generate no new warnings or errors
• [ ] I have added cookbook examples for my new addition (if needed)
• [ ] I have updated requirements.txt/pyproject.toml (if needed)
• [ ] I have verified my changes in a clean environment

Additional Notes

Include any deployment notes, performance implications, or other relevant information: