Twenty Twenty Three: Add aria-label to primary menu.

HTML templates can't contain translatable strings, and the primary menu needs a default ARIA label. Move the primary navigation into a hidden pattern and add the ARIA label.

Developed in #14091.

Props joedolson, rahultank, mukesh27, dhruvang21.
Fixes #66195.

git-svn-id: https://develop.svn.wordpress.org/trunk@64303 602fd350-edb4-49c9-b593-d223f7449a82

Author: joedolson

src/wp-content/themes/twentytwentythree/parts/header.html

@@ -5,7 +5,7 @@
 		<!-- wp:site-title {"level":0} /-->
 		<!-- wp:group {"layout":{"type":"flex","flexWrap":"wrap","justifyContent":"left"}} -->
 		<div class="wp-block-group">
-			<!-- wp:navigation {"layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"right"}} /-->
+			<!-- wp:pattern {"slug":"twentytwentythree/hidden-navigation"} /-->
 		</div>
 		<!-- /wp:group -->
 	</div>

src/wp-content/themes/twentytwentythree/patterns/hidden-navigation.php

@@ -0,0 +1,14 @@
+<?php
+/**
+ * Title: Hidden Navigation
+ * Slug: twentytwentythree/hidden-navigation
+ * Inserter: no
+ *
+ * @package WordPress
+ * @subpackage Twenty_Twenty_Three
+ * @since Twenty Twenty-Three 1.8
+ */
+
+?>
+
+<!-- wp:navigation {"ariaLabel":"<?php esc_attr_e( 'Primary', 'twentytwentythree' ); ?>","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"right"}} /-->