Create CITATION.bib

add CITATION.bib file for citation button (
https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-citation-files#other-citation-files )

Author: v0lta

CITATION.bib

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+@inproceedings{veeramacheneni25fwd,
+  author={Lokesh Veeramacheneni and Moritz Wolter and Hilde Kuehne and Juergen Gall},
+  title={Fréchet Wavelet Distance: A Domain-Agnostic Metric for Image Generation},
+  year={2025},
+  cdate={1735689600000},
+  url={https://openreview.net/forum?id=QinkNNKZ3b},
+  booktitle={ICLR},
+  crossref={conf/iclr/2025}
+}