Remove duplication in cards tables

We were using the same code in two places, so we're extracting the code
into a component in order to share it.

app/components/admin/widget/cards/table_component.rb

@@ -0,0 +1,8 @@
+class Admin::Widget::Cards::TableComponent < ApplicationComponent
+  attr_reader :cards, :no_cards_message
+
+  def initialize(cards, no_cards_message:)
+    @cards = cards
+    @no_cards_message = no_cards_message
+  end
+end