Refactor app in to its own slice

slices/main/repos/workout_repo.rb

@@ -0,0 +1,9 @@
+module Main
+  module Repos
+    class WorkoutRepo < Adamantium::Repo[:workouts]
+      def list
+        workouts.order(:published_at).to_a
+      end
+    end
+  end
+end