Add Ultralytics actions workflow in format.yml

[UltralyticsAssistant]

This pull request adds a workflow to automatically format code and documentation.

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

WARNING ⚠️ this PR is very large, summary may not cover all changes.

🌟 Summary

Enhancements to training, formatting, and exporting in YOLOv5.

📊 Key Changes

• Addition of Ultralytics YOLOv5 format workflow to automatically format code and documentation in pull requests and main branch.
• Code comments improved in benchmarks.py for clarity.
• Minor code refactoring for consistency, such as assertion message fixes and syntax improvements.
• Included emojis in logging messages for a more interactive experience.

🎯 Purpose & Impact

• The new workflow ensures consistent code formatting, enhancing code quality and readability.
• Refactored code and updated comments improve maintainability and understandability of the codebase.
• The use of emojis in logging adds a touch of personality and can improve user engagement.
  Overall, these changes contribute positively to the developer experience and project's technical robustness without altering functionality.

[github-actions]

👋 Hello @UltralyticsAssistant, thank you for submitting a YOLOv5 🚀 PR! To allow your work to be integrated as seamlessly as possible, we advise you to:

• ✅ Verify your PR is up-to-date with ultralytics/yolov5 master branch. If your PR is behind you can update your code by clicking the 'Update branch' button or by running git pull and git merge master locally.
• ✅ Verify all YOLOv5 Continuous Integration (CI) checks are passing.
• ✅ Reduce changes to the absolute minimum required for your bug fix or feature addition. "It is not daily increase but daily decrease, hack away the unessential. The closer to the source, the less wastage there is." — Bruce Lee