Adding copyright and license info

src/nassella.scm

@@ -1,3 +1,19 @@
+;; Copyright 2025-2026 Thomas Hintz
+
+;; This file is part of Nassella.
+
+;; Nassella 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.
+
+;; Nassella 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 General Public License for more details.
+
+;; You should have received a copy of the GNU Affero General Public License
+;; along with Nassella. If not, see <https://www.gnu.org/licenses/>.
+
 ;; (load "src/db.scm")
 ;; (load "src/mocks.scm")
 (include "db")