feat: set currentIndex from route on Web Platform (#963)

* Add RouterServiceInterface to Stacked package

* Add setCurrentWebPageIndex method to IndexTrackingViewModel

* Update cupertino_icons on example apps

* Sort routes to match BottomNavigation items order

* Call setCurrentWebPageIndex on Class Constructor

Allows to set the index of the Bottom Navigation Bar using the current
route at Web Platform when app starts from scratch which means there is
no state for the currentIndex property to track the selected button.

* Fix format

---------

Co-authored-by: Dane Mackier <dane.mackier@outlook.com>

example/navigator_example/pubspec.yaml

@@ -23,7 +23,7 @@ dependencies:
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^0.1.2
+  cupertino_icons: ^1.0.2
 
   # state management
   stacked:

example/router_example/lib/app/app.dart

@@ -32,10 +32,6 @@ import 'custom_route_transition.dart';
     MaterialRoute(page: HomeView, initial: true),
     MaterialRoute(page: BottomNavExample, children: [
       RedirectRoute(path: '', redirectTo: 'favorites'),
-      CustomRoute(
-        page: HistoryView,
-        transitionsBuilder: TransitionsBuilders.fadeIn,
-      ),
       AdaptiveRoute(
         path: 'favourites',
         page: FavoritesView,
@@ -44,6 +40,10 @@ import 'custom_route_transition.dart';
           CustomRoute(page: HistoryView),
         ],
       ),
+      CustomRoute(
+        page: HistoryView,
+        transitionsBuilder: TransitionsBuilders.fadeIn,
+      ),
       CupertinoRoute(page: ProfileView),
     ]),
     MaterialRoute(page: StreamCounterView),