Add Prettier for YAML formatting to Ultralytics Actions

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced code formatting and validation in GitHub workflows.

📊 Key Changes

• Split Markdown and YAML formatting responsibilities: Markdown continues to be formatted directly, while YAML formatting now uses the prettier tool.
• Maintained Python code formatting and docstring adjustments, as well as spell checking and broken link detection.
• Ensured the PR summary generation feature remains, powered by GPT-4, requiring specific API keys.

🎯 Purpose & Impact

• Improves code consistency: By using specialized tools for Markdown and YAML, the project ensures higher code and documentation quality.
• Enhances developer experience: Streamlines the contribution process, making it easier for developers to adhere to project standards.
• Automates quality checks: Helps in catching potential issues early, such as spelling errors or dead links, improving the overall robustness of the documentation.
• Facilitates PR reviews: The automated PR summaries provide a quick overview, helping maintainers to understand changes faster.

This update aims to refine the development workflow, making it more efficient and less error-prone, which benefits both project maintainers and contributors. 🛠️✨

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