legal: add NOTICE.md — library attribution (all original code)

Author: Code2Collapse

NOTICE.md

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+# NOTICE — ComfyUI-FolderIncrementer
+
+Copyright (c) 2025-2026 Likhith-24  
+License: MIT (see MIT-License)
+
+All source code in this project is original work by Likhith-24. No
+third-party source code has been copied or vendored.
+
+---
+
+## Third-Party Libraries (runtime dependencies)
+
+The following standard Python libraries are used. No source code from these
+projects is included in this repository.
+
+### 1. PyTorch
+
+**Repository**: <https://github.com/pytorch/pytorch>  
+**Copyright**: Copyright (c) 2016-2024 Facebook, Inc. and its affiliates  
+**License**: BSD-style license — <https://github.com/pytorch/pytorch/blob/main/LICENSE>
+
+### 2. Pillow
+
+**Repository**: <https://github.com/python-pillow/Pillow>  
+**Copyright**: Copyright (c) 1995-2011 Fredrik Lundh and contributors  
+**License**: HPND / MIT-style — <https://github.com/python-pillow/Pillow/blob/main/LICENSE>
+
+### 3. NumPy
+
+**Repository**: <https://github.com/numpy/numpy>  
+**Copyright**: Copyright (c) 2005-2024 NumPy Developers  
+**License**: BSD 3-Clause — <https://github.com/numpy/numpy/blob/main/LICENSE.txt>