Add official Google Play and Apple App Store badges

[glenn-jocher]

@AlanDimmer here are the new badges! @AyushExel

Signed-off-by: Glenn Jocher [email protected]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhancements to the YOLOv5 README for better accessibility and appearance.

📊 Key Changes

• 🖼️ Reintroduction of the YOLOv5 splash image at the top of the README.
• 📱 New badges for Ultralytics mobile apps with direct links to Google Play and the Apple App Store.
• 🔄 Minor reformatting and alignment adjustments for better visual flow.
• 🔗 Updated social media and resource links to ensure easy navigation.

🎯 Purpose & Impact

• 🆕 The inclusion of mobile app badges makes it easier for users to discover and download Ultralytics mobile apps, enhancing reach and user engagement.
• 🎨 The visual restructuring aims to improve the first impression and overall aesthetic of the project page, potentially increasing community interest and contributions.
• 🚀 With refreshed links and images, newcomers and existing users alike will find a more streamlined and user-friendly navigation experience.

[glenn-jocher]

Superseded by #9142