REUSE compliance.

client/common/lib/directives/translation.ts

@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2024 Mehdi Benadel <https://mehdibenadel.com>
+//
+// SPDX-License-Identifier: AGPL-3.0-only
+
 import { PartInfo, directive } from 'lit/directive.js'
 import { AsyncDirective } from 'lit/async-directive.js'
 import { RegisterClientHelpers } from '@peertube/peertube-types/client';