Add CITATION.cff file

Author: Grufoony

CITATION.cff

@@ -0,0 +1,13 @@
+cff-version: 1.2.0
+message: "If you use this software, please cite it as below."
+authors:
+- family-names: "Berselli"
+  given-names: "Gregorio"
+  orcid: "https://orcid.org/0009-0004-7797-9138"
+- family-names: "Balducci"
+  given-names: "Simone"
+  orcid: "https://orcid.org/0009-0001-0186-755X"
+title: "DynamicalSystemFramework"
+version: 4.3.1
+date-released: 2024-02-18
+url: "https://github.com/physycom/DynamicalSystemFramework"