Create CITATION.cff

Signed-off-by: Fabiana 🚀  Campanari <113218619+FabianaCampanari@users.noreply.github.com>

Author: FabianaCampanari

CITATION.cff

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+cff-version: 1.2.0
+title: Quantum-Software-Development
+QuantumComputing-Timeline-Formulas Repository
+message: If you really want to cite this repository, here's how you should cite it.
+type: software
+authors:
+  - given-names: Fabiana
+    family-names: Campanari
+repository-code: https://github.com/FabianaCampanari
+license: MIT License