Add: Lazy loading and refresh on pull down

lib/tools/routes.dart

@@ -0,0 +1,8 @@
+import 'package:flutter/material.dart';
+
+class CustomPageRoute extends MaterialPageRoute {
+  CustomPageRoute({builder}) : super(builder: builder);
+
+  @override
+  Duration get transitionDuration => const Duration(milliseconds: 0);
+}