Layout shift of VisibleContributors in ProjectCards

[georgimld]

When the ProjectCard are pre-rendered on the server, the controbutors are not shown, they are only loaded 1-2 seconds later causing a layout shift.

• This happens because the VisibleContributors component is rendered on the client.
• We should think about either moving the entire rendering of the component to the server (if possible, the component logic would need to be done differently)
• or at least having some sort of placeholder to avoid layout shifts