Add license to files

scripts/install_hook.py

@@ -1,3 +1,19 @@
+# SPDX-License-Identifier: GPL-3.0-only
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, version 3 of the License.
+#
+# 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# Copyright (c) 2024, YeetCode Developers <[email protected]>
+
 import os
 
 from pathlib import Path