add missing license

cerulean/home/default.nix

@@ -1,9 +1,23 @@
-# NOTE: you can access the system configuration via the `osConfig` arg
+# Copyright 2025-2026 _cry64 (Emile Clark-Boman)
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 {
   username,
   lib,
   ...
 }: {
+  # NOTE: you can access the system configuration via the `osConfig` arg
+
   # WARNING: required for home-manager to work
   programs.home-manager.enable = true; # user must apply lib.mkForce
   # Nicely reload systemd units when changing configs