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}

🌟 Summary

Introduced a new GitHub workflow for automatic code formatting and updated JSON to YOLO conversion scripts.

📊 Key Changes

• Added .github/workflows/format.yml for auto-formatting code in PRs and pushes to main and master branches.
• Updated string quotation consistency in general_json2yolo.py by replacing single quotes with double quotes.
• Standardized numerical formatting by ensuring decimals are consistent (e.g., 0. to 0.0) for clarity.
• Enhanced printing statements for better readability and consistency.
• Modified labelbox_json2yolo.py to include improvements similar to general_json2yolo.py.

🎯 Purpose & Impact

• The new GitHub workflow ensures code adheres to Ultralytics formatting standards, which helps maintain code quality and readability.
• Consistent quotation and number formatting create a more uniform codebase, making it easier to read and maintain.
• Clearer print statements aid in debugging and provide more informative messages for users.
• Overall, these changes should enhance both developer experience and the end-user's ability to utilize conversion scripts effectively.