chore: add NOTICE.md

NOTICE.md

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+## Copyright
+
+Copyright © 2025 Overextended
+
+Use of this code is subject to the terms and conditions of the license, as stated below.
+
+## Licensing and Attribution
+
+This project is licensed under the [LGPL‑3.0](https://www.gnu.org/licenses/lgpl-3.0.en.html) or any later version.
+
+A complete copy of the license is included in the [LICENSE](./LICENSE) file.
+
+When incorporating this work into your own project, you must:
+
+- Clearly credit the original authors and provide a link to the original project.
+- Document any modifications made to the original work.
+- Include the full text of the LGPL‑3.0 license with your distribution.
+- Ensure that your project remains available under the LGPL‑3.0 or a compatible open-source license.
+- Preserve all existing copyright and licensing notices.
+
+## Source Code
+
+The original source code is available at: [https://github.com/overextended/ox_lib](https://github.com/overextended/ox_lib)