Standardize warnings with WARNING ⚠️ ...

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhancements made to YOLOv5 codebase for improved stability and utility.

📊 Key Changes

• Introduced emojis() function to standardize emoji use across different platforms, particularly for Windows.
• Refined error messaging throughout the codebase to increase clarity and helpfulness.
• Adjusted logging to be more informative and less repetitive, removing prefix "WARNING:" where redundant.
• Incorporated TryExcept class to improve error handling in contexts and decorators.
• Modified various functionalities for better compatibility and performance, such as dataset loading, automated batching, and image verification.

🎯 Purpose & Impact

• 🔨 Purpose: These updates aim to create a more consistent user experience across different operating systems, reduce confusion with clearer error messages, and streamline the internal handling of exceptions and warnings.
• ⚡️ Impact: Users can expect more descriptive and less cluttered logs, better system compatibility, and a smoother overall experience when using YOLOv5 functionalities. Developers benefit from increased code reliability and ease of debugging.