[WIP] Introduce amp-story support via Gutenberg blocks

amp.php

@@ -247,6 +247,8 @@ function amp_init() {
 	AMP_HTTP::handle_xhr_request();
 	AMP_Theme_Support::init();
 	AMP_Validation_Manager::init();
+	AMP_Post_Type_Support::add_post_type_support();
+	AMP_Story_Post_Type::register();
 	add_action( 'init', array( 'AMP_Post_Type_Support', 'add_post_type_support' ), 1000 ); // After post types have been defined.
 
 	if ( defined( 'WP_CLI' ) && WP_CLI ) {
@@ -332,6 +334,10 @@ function amp_maybe_add_actions() {
 		return;
 	}
 
+	if ( is_singular( AMP_Story_Post_Type::POST_TYPE_SLUG ) ) {
+		return;
+	}
+
 	$is_amp_endpoint = is_amp_endpoint();
 
 	/**