implemented backend wallet service connection

frontend/pshared/lib/data/mapper/wallet/balance.dart

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+import 'package:pshared/data/dto/wallet/balance.dart';
+import 'package:pshared/data/mapper/wallet/money.dart';
+import 'package:pshared/models/wallet/balance.dart';
+
+
+extension WalletBalanceDTOMapper on WalletBalanceDTO {
+  WalletBalance toDomain() => WalletBalance(
+    available: available?.toDomain(),
+    pendingInbound: pendingInbound?.toDomain(),
+    pendingOutbound: pendingOutbound?.toDomain(),
+    calculatedAt: (calculatedAt == null || calculatedAt!.isEmpty)
+      ? null
+      : DateTime.tryParse(calculatedAt!),
+  );
+}

frontend/pshared/lib/data/mapper/wallet/money.dart

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+import 'package:pshared/data/dto/wallet/money.dart';
+import 'package:pshared/models/wallet/money.dart';
+
+
+extension MoneyDTOMapper on MoneyDTO {
+  WalletMoney toDomain() => WalletMoney(
+    amount: amount,
+    currency: currency,
+  );
+}

frontend/pshared/lib/data/mapper/wallet/response.dart

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+import 'package:pshared/api/responses/wallet_balance.dart';
+import 'package:pshared/api/responses/wallets.dart';
+import 'package:pshared/data/mapper/wallet/balance.dart';
+import 'package:pshared/data/mapper/wallet/wallet.dart';
+import 'package:pshared/models/wallet/balance.dart';
+import 'package:pshared/models/wallet/wallet.dart';
+
+extension WalletsResponseMapper on WalletsResponse {
+  List<WalletModel> toDomain() => wallets.map((w) => w.toDomain()).toList();
+}
+
+extension WalletBalanceResponseMapper on WalletBalanceResponse {
+  WalletBalance toDomain() => balance.toDomain();
+}

frontend/pshared/lib/data/mapper/wallet/wallet.dart

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+import 'package:pshared/data/dto/wallet/balance.dart';
+import 'package:pshared/data/dto/wallet/wallet.dart';
+import 'package:pshared/data/mapper/wallet/balance.dart';
+import 'package:pshared/data/mapper/wallet/money.dart';
+import 'package:pshared/models/wallet/wallet.dart';
+
+
+extension WalletDTOMapper on WalletDTO {
+  WalletModel toDomain({WalletBalanceDTO? balance}) => WalletModel(
+    walletRef: walletRef,
+    organizationRef: organizationRef,
+    ownerRef: ownerRef,
+    asset: WalletAsset(
+      chain: asset.chain,
+      tokenSymbol: asset.tokenSymbol,
+      contractAddress: asset.contractAddress,
+    ),
+    depositAddress: depositAddress,
+    status: status,
+    metadata: metadata,
+    createdAt: (createdAt == null || createdAt!.isEmpty) ? null : DateTime.tryParse(createdAt!),
+    updatedAt: (updatedAt == null || updatedAt!.isEmpty) ? null : DateTime.tryParse(updatedAt!),
+    balance: balance?.toDomain(),
+    availableMoney: balance?.available?.toDomain(),
+  );
+}