chore: added hathor header

Author: andreabadesso

packages/common/src/types.ts

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Hathor Labs and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 /**
  * Alerts should follow the on-call guide for alerting, see
  * https://github.com/HathorNetwork/ops-tools/blob/master/docs/on-call/guide.md#alert-severitypriority