implemented native share intent support for android and ios with chat and folder pickers

lib/routing/app_routes.dart

@@ -6,6 +6,7 @@ import 'package:persistent_bottom_nav_bar_v2/persistent_bottom_nav_bar_v2.dart';
 import '../api/marianumcloud/talk/room/get_room_response.dart';
 import '../main.dart';
 import '../model/account_data.dart';
+import '../share_intent/pending_share.dart';
 import '../state/app/modules/app_modules.dart';
 import '../state/app/modules/chat/bloc/chat_bloc.dart';
 import '../state/app/modules/chat_list/bloc/chat_list_bloc.dart';
@@ -17,6 +18,9 @@ import '../view/pages/more/roomplan/roomplan.dart';
 import '../view/pages/more/share/qr_share_view.dart';
 import '../view/pages/settings/modules_settings_page.dart';
 import '../view/pages/settings/settings.dart';
+import '../view/pages/share_intent/share_chat_picker.dart';
+import '../view/pages/share_intent/share_folder_picker.dart';
+import '../view/pages/share_intent/share_target_page.dart';
 import '../view/pages/talk/chat_view.dart';
 import '../view/pages/talk/details/message_reactions.dart';
 import '../view/pages/talk/talk_navigator.dart';
@@ -90,6 +94,30 @@ class AppRoutes {
     pushScreen(context, withNavBar: false, screen: const Roomplan());
   }
 
+  static void openShareTarget(BuildContext context, PendingShare share) {
+    pushScreen(
+      context,
+      withNavBar: false,
+      screen: ShareTargetPage(share: share),
+    );
+  }
+
+  static void openShareChatPicker(BuildContext context, PendingShare share) {
+    pushScreen(
+      context,
+      withNavBar: false,
+      screen: ShareChatPicker(share: share),
+    );
+  }
+
+  static void openShareFolderPicker(BuildContext context, PendingShare share) {
+    pushScreen(
+      context,
+      withNavBar: false,
+      screen: ShareFolderPicker(share: share),
+    );
+  }
+
   static void openMessageReactions(
     BuildContext context,
     String token,