feat:dio client done

lib/core/exceptions/failure.dart

@@ -0,0 +1,44 @@
+import 'package:equatable/equatable.dart';
+import 'package:dio/dio.dart';
+
+class Failure extends Equatable {
+  final String? errorMessage;
+  final String? errorKey;
+
+  const Failure({
+    this.errorMessage,
+    this.errorKey,
+  }); //error key kere bomasa required qilish shartamas
+  @override
+  List<Object?> get props => [
+    errorMessage,
+    errorKey,
+  ];
+}
+
+class ServerFailure extends Failure {
+  final num statusCode;
+
+  const ServerFailure({
+    required super.errorMessage,
+    required this.statusCode,
+    required super.errorKey,
+  });
+}
+
+class DioFailure extends Failure {
+  final DioExceptionType type;
+  final int? statusCode;
+
+  const DioFailure({
+    required super.errorMessage,
+    this.type = DioExceptionType.badResponse,
+    this.statusCode,
+  });
+}
+
+class ParsingFailure extends Failure {
+  const ParsingFailure({required super.errorMessage});
+}
+
+class CacheFailure extends Failure {}