Add CC BY-NC-SA 4.0 open source license for non-commercial usage

[Copilot]

Adds a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0) to the repository, restricting usage to non-commercial purposes only.

Changes Made

• LICENSE file: Created comprehensive CC BY-NC-SA 4.0 license text with clear terms for permitted and prohibited uses, including additional terms for commercial licensing inquiries
• package.json: Updated license field from "ISC" to "CC-BY-NC-SA-4.0"
• README.md: Expanded license section with detailed usage guidelines, including:
  • ✅ What users CAN do (personal, educational, research use, modifications, sharing with attribution)
  • ❌ What users CANNOT do (commercial use without permission, removing attributions, additional restrictions)
  • Instructions for obtaining commercial licensing
  • Link to full license text and online reference

License Summary

The CC BY-NC-SA 4.0 license permits sharing and adaptation for non-commercial purposes while requiring attribution and share-alike terms. Users who wish to use the software commercially must contact project maintainers for a commercial license.

Verification

• ✅ package.json validates as correct JSON
• ✅ Code review completed with no issues
• ✅ Security check passed (no security concerns)
• ✅ All files properly committed and pushed

The changes are documentation-only and do not affect any code functionality.

Original prompt

add open source license, authorized for non commercial usage

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[vanmarkic]

@copilot try again

[Copilot]

@copilot try again

Done! I've added a CC BY-NC-SA 4.0 (Creative Commons Attribution-NonCommercial-ShareAlike 4.0) license to the repository. This license allows non-commercial use while requiring attribution and share-alike terms.

Changes in commit 72b2317:

• Created LICENSE file with full license text
• Updated package.json license field to "CC-BY-NC-SA-4.0"
• Expanded README.md license section with clear usage guidelines

The license permits personal, educational, and research use, but prohibits commercial use without permission.