Update README description

[fcakyon]

cc: @glenn-jocher

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Simplified and updated the project template to modernize dependency management and improve clarity for new Python projects. 🚀

📊 Key Changes

• Replaced references to setup.py and requirements.txt with pyproject.toml for dependency and packaging management. 🛠️
• Adjusted customization instructions to align with the use of pyproject.toml. 📚
• Minor updates to clarify optional components (e.g., highlighting that pyproject.toml could be modified or removed as needed). ✏️

🎯 Purpose & Impact

• Modernization: Transition to pyproject.toml reflects current industry best practices, simplifying dependency setups and streamlining project structures. 🔄
• Improved Clarity: Refining the instructions ensures a smoother onboarding experience for new users and contributors. 🤝
• Flexibility: Updates provide better guidance for project customization, making the template more adaptable to diverse project needs. 🎨

This makes the template more robust, user-friendly, and aligned with modern Python development standards. 🌟

[UltralyticsAssistant]

🎉 The PR is merged—thank you, @fcakyon and @glenn-jocher, for helping modernize and elevate our Python template! 🚀 Your thoughtful updates bring clarity, flexibility, and cutting-edge practices to the heart of our work, paving the way for more effective collaboration and innovation in the community. 🌟

As Marcus Aurelius once said, "What stands in the way becomes the way." Your contributions have transformed complexity into progress, making the journey smoother for all who build with us. 🙌 Keep up the amazing work—this is how we shape the future! 🌍✨