add: NYJC-CSUL license v1.0

Author: ngjunsiang

pages/LICENSE.md

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+# NYJC Computing Student Use License (NYJC-CSUL)
+**Version 1.0 – Effective 19/05/2025**  
+[Full license available at nyjc-computing.github.io/LICENSE](https://nyjc-computing.github.io/LICENSE)
+
+---
+
+## 1. License Grant
+NYJC Computing grants a **non-exclusive, non-transferable, limited-use license** to **current and former NYJC Computing students** to:  
+- Access, download, annotate, and integrate the Materials into personal study systems for **personal academic use only**.  
+- Share the Materials **non-commercially** with peers under the conditions below.
+
+## 2. Redistribution and Citation
+Redistribution of the Materials to others (including juniors, classmates, or external parties) is **permitted only if ALL of the following conditions are met**:  
+- The **full license text is included** unchanged with the shared Materials.  
+- The Materials are shared **in their original, unmodified form** (no edits, cropping, reformatting, remixing, or excerpting).  
+- The source **“NYJC Computing” is clearly cited** wherever the Materials are shared or displayed.
+
+## 3. Prohibited Uses
+Users must NOT:  
+- Sell, license, or commercially exploit the Materials or any derivative works.  
+- Modify or remix the Materials for redistribution.  
+- Share Materials with individuals who are not current or former NYJC Computing students without adhering to Section 2.  
+- Remove or alter any copyright or license notices.
+
+## 4. Ownership
+All Materials remain the intellectual property of their respective creators and NYJC Computing. This license **does not transfer ownership or intellectual property rights**.
+
+## 5. Duration and Termination
+This license is valid while you are a current or former NYJC Computing student. Breach of any term may result in access revocation or disciplinary action.
+
+## 6. Compliance
+Users must adhere to NYJC’s academic integrity policies. Misuse or unauthorized redistribution may lead to sanctions.