Update README.md

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced the README.md with a clearer example showcasing deferred imports using the lazy context manager.

📊 Key Changes

• Updated the README.md example to demonstrate import deferral with precise timing using time.perf_counter().
• Added an explanation and output examples to highlight the difference between initial loading and usage timing.

🎯 Purpose & Impact

• 🕒 Improved clarity: Makes it easier for users to understand and measure how lazy defers imports until first use.
• 🔧 Practical guidance: Adds a realistic usage example with a clear breakdown of performance implications.
• 🚀 User-friendly documentation: Lowers the learning curve for developers, enhancing adoption of the library.

[UltralyticsAssistant]

👋 Hello @glenn-jocher, thank you for submitting an ultralytics/autoimport 🚀 PR! To ensure a seamless integration of your work, please review the following checklist:

• ✅ Define a Purpose: Clearly explain the purpose of your fix or feature in your PR description, and link to any relevant issues. Ensure your commit messages are clear, concise, and adhere to the project's conventions.
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• ✅ Update Documentation: Update the relevant documentation for any new or modified features.
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Please note that this is an automated response to streamline the review process, but an Ultralytics engineer will assist you soon to review your PR thoroughly. If you have specific questions, let us know! 😊

[UltralyticsAssistant]

✨ Your PR has been merged, @glenn-jocher!

Thank you for enhancing clarity and usability in our documentation—your thoughtful update to the README sets the stage for developers to unlock the full potential of import deferral with ease.

As Leonardo da Vinci once said, "Simplicity is the ultimate sophistication." Your contribution elegantly transforms complexity into clear, actionable insight, empowering users to harness the power of lazy with precision and confidence.

Your effort truly makes a difference—cheers to making development smoother and smarter for everyone! 🚀