feat(user): routes and simple template

lib/learning_phoenix_web/controllers/user_html.ex

@@ -0,0 +1,10 @@
+defmodule LearningPhoenixWeb.UserHTML do
+  @moduledoc """
+  This module contains pages rendered by PageController.
+
+  See the `page_html` directory for all templates available.
+  """
+  use LearningPhoenixWeb, :html
+
+  embed_templates "user_html/*"
+end