chore(master): release 2.7.2

[Kohulan]

🤖 I have created a release beep boop

2.7.2 (2025-12-02)

Features

• Update for Keras 3 compatibility, python 3.12 compatibility and improve model download logic (7cde9ae)

Bug Fixes

• Add pyproject.toml with build-system requirements (e98884c)
• Add setuptools to tox conda_deps for build (9655712)
• Fix uint8 overflow in increase_contrast for NumPy 2.x compatibility (9f01ec5)
• include model card README.md (ad5ebeb)
• Modernize CI to use tox 4 with isolated builds (4be4c37)
• removed an unused import (d1f660d)
• tests to work with python 3.12 (41a5dc7)
• Update README with research group and project details (12e0850)

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[Kohulan]

🤖 Release is at https://github.com/Kohulan/DECIMER-Image_Transformer/releases/tag/v2.7.2 🌻