add files

amp/header.php

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+<?php
+/**
+ * Header template part.
+ *
+ * 🚫🚫🚫
+ * DO NOT EDIT THIS FILE WHILE INSIDE THE PLUGIN! Changes You make will be lost when a new version
+ * of the AMP plugin is released. You need to copy this file out of the plugin and put it into your
+ * custom theme, for example. To learn about how to customize these Reader-mode AMP templates, please
+ * see: https://amp-wp.org/documentation/how-the-plugin-works/classic-templates/
+ * 🚫🚫🚫
+ *
+ * @package AMP
+ */
+
+/**
+ * Context.
+ *
+ * @var AMP_Post_Template $this
+ */
+
+$this->load_parts( [ 'header-bar' ] );