Add debug logging to RouteParser methods

Inserted debugPrint statements in parseRouteInformation and restoreRouteInformation to log URI parsing and normalization steps for easier debugging.

Author: FeodorFitsner

packages/flet/lib/src/routing/route_parser.dart

@@ -6,20 +6,26 @@ class RouteParser extends RouteInformationParser<String> {
       RouteInformation routeInformation) async {
     final uri = routeInformation.uri;
 
+    debugPrint("RouteParser.parseRouteInformation: $uri");
+
     final normalized = Uri(
       path: uri.path.isEmpty ? '/' : uri.path,
       query: uri.query,
       fragment: uri.fragment,
     );
 
+    debugPrint("RouteParser.parseRouteInformation normalized: $normalized");
+
     // Return a location string like "/aaa?x=1"
     return normalized.toString();
   }
 
   @override
   RouteInformation restoreRouteInformation(String configuration) {
+    debugPrint("RouteParser.restoreRouteInformation: $configuration");
     // Ensure Router gets a path-based URI, not "flet://..."
     final uri = Uri.parse(configuration);
+    debugPrint("RouteParser.restoreRouteInformation: after");
     final normalized = Uri(
       path: uri.path.isEmpty ? '/' : uri.path,
       query: uri.query,