Add Elixir example files

sample_files/elixir_1.ex

@@ -0,0 +1,13 @@
+defmodule ExampleComponent do
+  defp greet do
+    "Hello world"
+  end
+
+  def greet_component(assigns) do
+    ~H"""
+    <p class="title">
+      <%= greet() %>
+    </p>
+    """
+  end
+end

sample_files/elixir_2.ex

@@ -0,0 +1,13 @@
+defmodule ExampleComponent do
+  defp greet_str do
+    "Hello world!"
+  end
+
+  def greet_component(assigns) do
+    ~H"""
+    <p class="title new-class">
+      <b><%= greet_str() %></b>
+    </p>
+    """
+  end
+end