Let's drop gravity-icons (controlled by russians)

[ayanko]

Gravity Icons and other gravity stuff are developed and controlled by russians (people call them ruZZians)

https://github.com/gravity-ui/icons/blob/main/LICENSE

Copyright (c) 2022 YANDEX LLC

And you should know that is danger because they can break stuff.

Also some resources like http://gravity-ui.com/ is not available.
Because these country will soon have zero internet.

So I don't think it's good idea to promote their package in demo examples and in general.