Migrate `GitStars` component to Chakra UI

[pettinarip]

This is part of our Implement UI library epic.

Description

Migrate src/components/GitStars.tsx from emotion styled components to chakra.

This components is used in https://ethereum.org/en/developers/local-environment/

Additional resources

Check our epic for more information & check our migration guide.

[curiousyuvi]

I would like to work on this issue, please assign it to me.

[pettinarip]

Thanks @curiousyuvi!

[curiousyuvi]

Hey @pettinarip, I think this PR already fixes this issue, so I'll find some other issue to contribute.