renders_none :empty slot to handle fallback rendering on empty collection

[Menelle]

Thinking about the need/addition of a handle_none slot hook that would handle the fallback for collection like we use to with partial rendering.
Maybe there's already a way to handle this cleanly, I'd love to hear how you guys are handling this without the if/else in view.

 #the partial way
render(partial: "product", collection: @products) || render("empty")

# current implementation
# in view
if @products.size.zero?
  render Product::EmptyComponent.new
else
  render ProductComponent.with_collection(@products, user: current_user)
end

# proposed solution
# in view
render ProductComponent.with_collection(@products, user: current_user)

# inside product_component.rb
renders_none :none, EmptyComponent