Add data layer for get Session

lib/features/session/data/datasource/session_datasource.dart

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+import 'package:jmap_dart_client/jmap/core/session/session.dart';
+
+abstract class SessionDataSource {
+  Future<Session> getSession();
+}

lib/features/session/data/datasource_impl/session_datasource_impl.dart

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+import 'package:jmap_dart_client/jmap/core/session/session.dart';
+import 'package:tmail_ui_user/features/session/data/datasource/session_datasource.dart';
+import 'package:tmail_ui_user/features/session/data/network/session_api.dart';
+
+class SessionDataSourceImpl extends SessionDataSource {
+
+  final SessionAPI sessionAPI;
+
+  SessionDataSourceImpl(this.sessionAPI);
+
+  @override
+  Future<Session> getSession() {
+    return Future.sync(() async {
+      return await sessionAPI.getSession();
+    }).catchError((error) {
+      throw error;
+    });
+  }
+}

lib/features/session/data/network/session_api.dart

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+import 'dart:async';
+
+import 'package:jmap_dart_client/http/http_client.dart';
+import 'package:jmap_dart_client/jmap/core/capability/capability_identifier.dart';
+import 'package:jmap_dart_client/jmap/core/capability/capability_properties.dart';
+import 'package:jmap_dart_client/jmap/core/session/get_session.dart';
+import 'package:jmap_dart_client/jmap/core/session/session.dart';
+
+class SessionAPI {
+
+  final HttpClient httpClient;
+
+  SessionAPI(this.httpClient);
+
+  Future<Session> getSession({Map<CapabilityIdentifier, CapabilityProperties Function(Map<String, dynamic>)>? converters}) async {
+    final getSessionBuilder = GetSessionBuilder(httpClient);
+
+    final result = await getSessionBuilder.build().execute();
+
+    return result;
+  }
+}

lib/features/session/data/repository/session_repository_impl.dart

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+import 'package:jmap_dart_client/jmap/core/session/session.dart';
+import 'package:tmail_ui_user/features/session/data/datasource/session_datasource.dart';
+import 'package:tmail_ui_user/features/session/domain/repository/session_repository.dart';
+
+class SessionRepositoryImpl extends SessionRepository {
+
+  final SessionDataSource sessionDataSource;
+
+  SessionRepositoryImpl(this.sessionDataSource);
+
+  @override
+  Future<Session> getSession() {
+    return sessionDataSource.getSession();
+  }
+}