possibility to inject child tabs

app/lib/core/routing/routes.browser.dart

@@ -57,7 +57,7 @@ class WebPageRoute extends GoRouteData with _$WebPageRoute {
   }
 }
 
-enum TabType { regular, private }
+enum TabType { regular, private, child }
 
 class SearchRoute extends GoRouteData with _$SearchRoute {
   static const String emptySearchText = ' ';

app/lib/core/routing/routes.g.dart

@@ -388,6 +388,7 @@ mixin _$SearchRoute on GoRouteData {
 const _$TabTypeEnumMap = {
   TabType.regular: 'regular',
   TabType.private: 'private',
+  TabType.child: 'child',
 };
 
 mixin _$TorProxyRoute on GoRouteData {