Implemented ledger provider

frontend/pshared/lib/api/responses/ledger/accounts.dart

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+import 'package:json_annotation/json_annotation.dart';
+
+import 'package:pshared/data/dto/ledger/account.dart';
+
+part 'accounts.g.dart';
+
+
+@JsonSerializable(explicitToJson: true)
+class LedgerAccountsResponse {
+  final List<LedgerAccountDTO> accounts;
+
+  const LedgerAccountsResponse({required this.accounts});
+
+  factory LedgerAccountsResponse.fromJson(Map<String, dynamic> json) => _$LedgerAccountsResponseFromJson(json);
+  Map<String, dynamic> toJson() => _$LedgerAccountsResponseToJson(this);
+}

frontend/pshared/lib/api/responses/ledger/balance.dart

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+import 'package:json_annotation/json_annotation.dart';
+
+import 'package:pshared/data/dto/ledger/balance.dart';
+
+part 'balance.g.dart';
+
+
+@JsonSerializable(explicitToJson: true)
+class LedgerBalanceResponse {
+  final LedgerBalanceDTO balance;
+
+  const LedgerBalanceResponse({required this.balance});
+
+  factory LedgerBalanceResponse.fromJson(Map<String, dynamic> json) => _$LedgerBalanceResponseFromJson(json);
+  Map<String, dynamic> toJson() => _$LedgerBalanceResponseToJson(this);
+}