Add/rest api for block commenting

lib/compat/wordpress-6.7/rest-api.php

@@ -148,11 +148,30 @@
  * @return array The updated array of comment types.
  */
 if ( ! function_exists( 'update_get_avatar_comment_type' ) && gutenberg_is_experiment_enabled( 'gutenberg-block-comment' ) ) {
     function update_get_avatar_comment_type( $comment_type ) {
 
         $comment_type[] = 'block_comment';
         return $comment_type;
 
     }
     add_filter( 'get_avatar_comment_types', 'update_get_avatar_comment_type', 10, 1 );
 }
+
+/**
+ * Updates the comment type filter dropdown options.
+ *
+ * This function is only defined if the 'gutenberg-block-comment' experiment is enabled and the 'update_comment_type_filter_dropdown' function does not already exist.
+ * It returns an array of comment type options for the comment type filter dropdown in the admin area.
+ *
+ * @return array An associative array of comment type options.
+ * The keys are the comment type slugs and the values are the translated names of the comment types.
+ */
+if ( ! function_exists( 'update_comment_type_filter_dropdown' ) && gutenberg_is_experiment_enabled( 'gutenberg-block-comment' ) ) {
+	function update_comment_type_filter_dropdown() {
+		return array(
+			'comment' => __( 'Comments' ),
+			'block_comment' => __( 'Block Comments' ),
+		);
+	}
+	add_filter( 'admin_comment_types_dropdown', 'update_comment_type_filter_dropdown' );
+}