Add metaclass-registry bib entry

Author: trissim

paper.bib

@@ -65,3 +65,12 @@ @software{pyclesperanto
   url = {https://doi.org/10.5281/zenodo.14199059},
   publisher = {Zenodo}
 }
+
+@software{metaclassregistry,
+  author       = {Simas, Tristan},
+  title        = {metaclass-registry: Auto-registration metaclass for Python plugin systems},
+  year         = {2026},
+  publisher    = {GitHub},
+  url          = {https://github.com/trissim/metaclass-registry},
+  note         = {Provides AutoRegisterMeta for dynamic class registration}
+}