removed intent_ref from frontend

frontend/pshared/lib/api/requests/payment/initiate_payments.dart

@@ -1,40 +1,20 @@
+import 'package:json_annotation/json_annotation.dart';
 import 'package:pshared/api/requests/payment/base.dart';
 
+part 'initiate_payments.g.dart';
+
+
+@JsonSerializable()
 class InitiatePaymentsRequest extends PaymentBaseRequest {
   final String quoteRef;
-  final String? intentRef;
-  final List<String>? intentRefs;
 
   const InitiatePaymentsRequest({
     required super.idempotencyKey,
     super.metadata,
     required this.quoteRef,
-    this.intentRef,
-    this.intentRefs,
   });
 
-  factory InitiatePaymentsRequest.fromJson(Map<String, dynamic> json) {
-    return InitiatePaymentsRequest(
-      idempotencyKey: json['idempotencyKey'] as String,
-      metadata: (json['metadata'] as Map<String, dynamic>?)?.map(
-        (key, value) => MapEntry(key, value as String),
-      ),
-      quoteRef: json['quoteRef'] as String,
-      intentRef: json['intentRef'] as String?,
-      intentRefs: (json['intentRefs'] as List<dynamic>?)
-          ?.map((value) => value as String)
-          .toList(),
-    );
-  }
-
+  factory InitiatePaymentsRequest.fromJson(Map<String, dynamic> json) => _$InitiatePaymentsRequestFromJson(json);
   @override
-  Map<String, dynamic> toJson() {
-    return <String, dynamic>{
-      'idempotencyKey': idempotencyKey,
-      'metadata': metadata,
-      'quoteRef': quoteRef,
-      if (intentRef != null) 'intentRef': intentRef,
-      if (intentRefs != null) 'intentRefs': intentRefs,
-    };
-  }
+  Map<String, dynamic> toJson() => _$InitiatePaymentsRequestToJson(this);
 }