removed country flags package and read flags from server and implement svg cahce structure

lib/views/home/tenders_list_item.dart

@@ -1,4 +1,3 @@
-import 'package:country_flags/country_flags.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_svg/svg.dart';
 import 'package:tm_app/data/services/model/tender_data/tender_data.dart';
@@ -8,6 +7,7 @@ import 'package:tm_app/views/home/widgets/tender_card_progress_bar.dart';
 import '../../core/constants/assets.dart';
 import '../../core/theme/colors.dart';
 import '../../core/utils/size_config.dart';
+import '../shared/flag.dart';
 
 class TendersListItem extends StatelessWidget {
   const TendersListItem({required this.tender, super.key});
@@ -113,14 +113,8 @@ class TendersListItem extends StatelessWidget {
                   ),
                 ),
                 SizedBox(width: 8.0.w()),
-                SizedBox(
-                  width: 32.0.w(),
-                  height: 21.0.h(),
-                  child: CountryFlag.fromCountryCode(
-                    tender.countryCode!,
-                    shape: RoundedRectangle(4),
-                  ),
-                ),
+                if (tender.countryCode != null)
+                  Flag(countryCode: tender.countryCode!),
                 Spacer(),
               ],
             ),