Add HUB Banner

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhancements to documentation for CRUD operations and introduction of Ultralytics HUB in the README.

📊 Key Changes

• Clarified terminology by explicitly defining CRUD (create, read, update, delete) operations in the Operations section.
• Added a new section promoting the Ultralytics HUB, including a descriptive preview image and a link for easy access.

🎯 Purpose & Impact

• Improved Clarity: By spelling out CRUD, the documentation becomes more accessible to beginners or non-developers who may be unfamiliar with the acronym.
• Increased Awareness: The addition of the Ultralytics HUB section aims to raise user awareness about the platform's capabilities, such as easy model training and deployment, catering to users of varying skill levels.
• Seamless User Experience: The promotion of the Ultralytics HUB and its no-code solutions could attract a wider audience to try out AI tools, potentially increasing the user base and community engagement. 🚀💡🤖