TF-3707 Implement clear mailbox method in data and domain layer

Signed-off-by: dab246 <tdvu@linagora.com>

lib/features/mailbox/data/datasource_impl/mailbox_cache_datasource_impl.dart

@@ -161,4 +161,9 @@ class MailboxCacheDataSourceImpl extends MailboxDataSource {
       return await _mailboxCacheManager.clearAll(accountId, userName);
     }).catchError(_exceptionThrower.throwException);
   }
+
+  @override
+  Future<UnsignedInt> clearMailbox(Session session, AccountId accountId, MailboxId mailboxId) {
+    throw UnimplementedError();
+  }
 }

lib/features/mailbox/data/datasource_impl/mailbox_datasource_impl.dart

@@ -154,4 +154,11 @@ class MailboxDataSourceImpl extends MailboxDataSource {
   Future<void> clearAllMailboxCache(AccountId accountId, UserName userName) {
     throw UnimplementedError();
   }
+
+  @override
+  Future<UnsignedInt> clearMailbox(Session session, AccountId accountId, MailboxId mailboxId) {
+    return Future.sync(() async {
+      return await mailboxAPI.clearMailbox(session, accountId, mailboxId);
+    }).catchError(_exceptionThrower.throwException);
+  }
 }