feat: Implement Google Places Autocomplete for Staff Location

- Implemented strictly filtered Google Places Autocomplete (cities only) for Staff Profile Setup.
- Centralized Google Places API Key configuration in Core AppConfig.
- Updated Client Hubs to use the centralized AppConfig.
- Verified ViewOrdersCubit logic for weekly order summaries.

apps/mobile/packages/core/lib/core.dart

@@ -4,3 +4,4 @@ export 'src/domain/arguments/usecase_argument.dart';
 export 'src/domain/usecases/usecase.dart';
 export 'src/utils/date_time_utils.dart';
 export 'src/presentation/widgets/web_mobile_frame.dart';
+export 'src/config/app_config.dart';

apps/mobile/packages/core/lib/src/config/app_config.dart

@@ -0,0 +1,5 @@
+class AppConfig {
+  AppConfig._();
+
+  static const String googlePlacesApiKey = String.fromEnvironment('GOOGLE_PLACES_API_KEY');
+}