added new pages

lib/pages/edit_checklist_page.dart

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