add citation file

Author: PabloCorcho

CITATION.cff

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+cff-version: "1.2.0"
+authors:
+- family-names: Corcho-Caballero
+  given-names: Pablo
+  orcid: "https://orcid.org/0000-0001-6327-7080"
+- family-names: Ascasibar
+  given-names: Yago
+  orcid: "https://orcid.org/0000-0003-1577-2479"
+- family-names: Jiménez-López
+  given-names: Daniel
+  orcid: "https://orcid.org/0009-0001-2907-8691"
+contact:
+- family-names: Corcho-Caballero
+  given-names: Pablo
+  orcid: "https://orcid.org/0000-0001-6327-7080"
+- family-names: Ascasibar
+  given-names: Yago
+  orcid: "https://orcid.org/0000-0003-1577-2479"
+- family-names: Jiménez-López
+  given-names: Daniel
+  orcid: "https://orcid.org/0009-0001-2907-8691"
+doi: 10.5281/zenodo.16322123
+message: If you use this software, please cite our article in the
+  Journal of Open Source Software.
+preferred-citation:
+  authors:
+  - family-names: Corcho-Caballero
+    given-names: Pablo
+    orcid: "https://orcid.org/0000-0001-6327-7080"
+  - family-names: Ascasibar
+    given-names: Yago
+    orcid: "https://orcid.org/0000-0003-1577-2479"
+  - family-names: Jiménez-López
+    given-names: Daniel
+    orcid: "https://orcid.org/0009-0001-2907-8691"
+  date-published: 2025-07-28
+  doi: 10.21105/joss.08203
+  issn: 2475-9066
+  issue: 111
+  journal: Journal of Open Source Software
+  publisher:
+    name: Open Journals
+  start: 8203
+  title: The Population Synthesis Toolkit (PST) Python Library
+  type: article
+  url: "https://joss.theoj.org/papers/10.21105/joss.08203"
+  volume: 10
+title: The Population Synthesis Toolkit (PST) Python Library