Migrate from UIShelf to TopbarPlus v3

Is your feature request related to a problem?

UIShelf is now discontinued in favor of TopbarPlus v3.

https://devforum.roblox.com/t/uishelf-archived-create-modern-intuitive-topbar-icons/2651308

Describe the solution you'd like

A migration to TopbarPlus v3.

Describe alternatives you've considered

No response

Additional context

No response

Code of Conduct

• [X] I have read and agree to the project's Code of Conduct