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

Automated formatting workflow addition and code refactoring in plots.py and various utility files.

📊 Key Changes

• Added a .github/workflows/format.yml to implement automatic code formatting.
• In plots.py, refactored plotting code for readability and consistency, involving quotation mark standardization and decomposition of complex function calls.
• Updated utility files (KLT.py, MSV.py, NLS.py, etc.) to use clearer numerical representations and consistent string quoting.
• Improved variable naming and string quoting consistency in images.py.
• Fixed a minor path string issue in vid2images.py.

🎯 Purpose & Impact

• The new GitHub Actions workflow will ensure consistent code style across commits and pull requests.
• Refactored code will enhance readability and maintainability for developers.
• Users should experience no direct impact, as these changes are mostly internal code quality improvements without altering functionality.