Add CC BY-NC 4.0 license

Added Creative Commons Attribution-NonCommercial 4.0 license file.

Author: geopayme

LICENSES/CC-BY-NC-4.0.txt

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+Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
+
+Copyright (c) 2025 Antonios Valamontes
+
+You are free to:
+- Share — copy and redistribute the material in any medium or format.
+- Adapt — remix, transform, and build upon the material
+for non-commercial purposes.
+
+Under the following terms:
+- Attribution — You must give appropriate credit, provide a link to the license,
+  and indicate if changes were made. You may do so in any reasonable manner,
+  but not in any way that suggests the licensor endorses you or your use.
+- NonCommercial — You may not use the material for commercial purposes.
+- No additional restrictions — You may not apply legal terms or technological
+  measures that legally restrict others from doing anything the license permits.
+
+Commercial licensing:
+For any intended commercial application, manufacturing, distribution,
+or derivative commercialization of the Tri-Modal Catheter Lock (TCL)
+or associated intellectual property, prior written authorization is required.
+Please contact:
+
+Antonios Valamontes  
+Email: [email protected]  
+Kapodistrian Academy of Science  
+
+Full legal code: https://creativecommons.org/licenses/by-nc/4.0/legalcode