chore: add license

LICENSE

@@ -0,0 +1,27 @@
+GPL-3.0-or-later License with Additional Terms
+=============================================
+
+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, 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 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/>.
+
+Additional Terms
+----------------
+
+1. Redistribution and deployment of this documentation on other websites without explicit permission from the original author is prohibited.
+2. Any use of this documentation must include proper attribution to the original author.
+3. Commercial use of this documentation is not permitted without prior written consent from the original author.
+
+Contact Information
+-------------------
+
+For permissions beyond the scope of this license, please contact Logto at <mailto:[email protected]>.