Feedback states

[ilsea]

• EmptyState
  • The query worked but returned zero results, or My Shelf has no books yet
  • title, message, action? (like a "Clear filters" button)
• LoadingState
  • label?
• ErrorState
  • The query failed (backend down, network error)
  • message, onRetry
• LoadMoreButton
  • onClick, isLoading, hasMore