Refactor app in to its own slice

slices/main/repos/page_repo.rb

@@ -0,0 +1,19 @@
+module Main
+  module Repos
+    class PageRepo < Adamantium::Repo[:pages]
+      def fetch!(slug:)
+        pages
+          .published
+          .where(slug: slug).one!
+      end
+
+      def for_main_nav
+        pages
+          .select(:name, :slug, :light_colour, :dark_colour, :published_at)
+          .published
+          .where(main_menu: true)
+          .to_a
+      end
+    end
+  end
+end