[pagex] implement visibility flags

[voidcannon] migrate to visibility flags

content/articles/playground-p3/playground-p3.pagex.js

@@ -2,7 +2,7 @@ import {
     VoidcannonHeaderLayoutType,
     VoidcannonHeaderType,
     VoidcannonContentType,
-    VoidcannonVisibilityLevel
+    VoidcannonVisibilityFlags
 } from "voidcannon";
 
 import testauthorPagex from "../../authors/testauthor.pagex.js";
@@ -24,7 +24,10 @@ export default {
     title: "Playground P3 Test Article",
     abstract: "An article about the 2024 video game 'Persona 3 Reload'.",
     created_at: 1757861297516,
-    visibility_level: VoidcannonVisibilityLevel.HIDDEN_IN_RECENTS,
+    visibility_flags: [
+        VoidcannonVisibilityFlags.HIDDEN_IN_RECENTS,
+        VoidcannonVisibilityFlags.HIDDEN_IN_SITEMAP,
+    ],
     theme: {
         colors: {
             light: "#0eb1f4",