Add license

Author: inrayTW1

LICENSE.md

@@ -0,0 +1,17 @@
+## License
+
+SPDX-License-Identifier: CC-BY-NC-SA-4.0
+
+This project is licensed under the **Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)** license.
+
+You are free to:
+- Share - copy and redistribute the material in any medium or format
+- Adapt - remix, transform, and build upon the material
+
+Under the following terms:
+- Attribution - You must give appropriate credit, provide a link to the license, and indicate if changes were made.
+- NonCommercial - You may not use the material for commercial purposes.
+- ShareAlike - If you remix, transform, or build upon the material, you must distribute your contributions under the same license.
+
+This file is a human-readable summary. The full legal text is available at:
+https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode