Add importing html and save it to Article

Additionally defines a wizard logic which is partially unused yet.

lib/outlook/internal_tree/raw_internal_tree.ex

@@ -0,0 +1,19 @@
+defmodule Outlook.Articles.RawInternalTree do
+  use Ecto.Type
+
+  def type, do: :string
+
+  def cast([] = tree) do
+    {:ok, tree}
+  end
+
+  def cast(_), do: :error
+
+  def load(tree) when is_binary(tree) do
+    {:ok, Jason.decode!(tree, keys: :atoms!)}
+  end
+
+  def dump([] = tree ), do: {:ok, Jason.encode!(tree)}
+  def dump(_), do: :error
+
+end