Pages Added + Provider Function Extented

Missing Pages were added (currently no content)

Provider changes the title to the right one

lib/pages/pageService.dart

@@ -0,0 +1,10 @@
+import 'package:flutter/material.dart';
+
+class PageService extends StatelessWidget {
+  const PageService({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return const Placeholder();
+  }
+}