added wallet functionality

lib/screens/accounts/models/account_model.dart

@@ -0,0 +1,67 @@
+import 'package:json_annotation/json_annotation.dart';
+
+part 'account_model.g.dart';
+
+@JsonSerializable()
+class CurrencyModel {
+  final String id;
+  final String? createdAt;
+  final String name;
+  final String symbol;
+  final String code;
+  final double rate;
+  final bool defaultCurrency;
+
+  CurrencyModel({
+    required this.id,
+    this.createdAt,
+    required this.name,
+    required this.symbol,
+    required this.code,
+    required this.rate,
+    required this.defaultCurrency,
+  });
+
+  factory CurrencyModel.fromJson(Map<String, dynamic> json) =>
+      _$CurrencyModelFromJson(json);
+
+  Map<String, dynamic> toJson() => _$CurrencyModelToJson(this);
+}
+
+@JsonSerializable()
+class AccountModel {
+  final String name;
+  final String description;
+  final String accountNumber;
+  final String alternateAccountNumber;
+  final String type;
+  final String category;
+  final String ledger;
+  final double balance;
+  final String partyType;
+  final String party;
+  final CurrencyModel currency;
+  final String customerStringId;
+  final String companyStringId;
+
+  AccountModel({
+    required this.name,
+    required this.description,
+    required this.accountNumber,
+    required this.alternateAccountNumber,
+    required this.type,
+    required this.category,
+    required this.ledger,
+    required this.balance,
+    required this.partyType,
+    required this.party,
+    required this.currency,
+    required this.customerStringId,
+    required this.companyStringId,
+  });
+
+  factory AccountModel.fromJson(Map<String, dynamic> json) =>
+      _$AccountModelFromJson(json);
+
+  Map<String, dynamic> toJson() => _$AccountModelToJson(this);
+}