Add copyright statements

frontend/src/i18n/pl_PL/index.js

@@ -1,3 +1,23 @@
+/*
+ * index.js
+ * Copyright (c) 2022 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 export default {
     "config": {
         "html_language": "pl",
@@ -178,4 +198,4 @@ export default {
         "pref_QTD": "Kwarta\u0142 do daty",
         "pref_MTD": "Miesi\u0105c do daty"
     }
-}
+}