Add Zenodo DOI to CITATION.cff

CITATION.cff

@@ -1,6 +1,6 @@
 cff-version: 1.2.0
 message: "If you use this software, please cite it using these metadata."
-title: "OQpy: Generating OpenQASM 3 + OpenPulse in Python"
+title: "OQpy: OpenQASM 3 + OpenPulse in Python"
 abstract: >
   The goal of oqpy ("ock-pie") is to make it easy to generate OpenQASM 3 + OpenPulse
   in Python. The oqpy library builds off of the openqasm3 and openpulse packages,
@@ -36,3 +36,4 @@ keywords:
   - openqasm
   - quantum
 repository-code: "https://github.com/openqasm/oqpy"
+doi: 10.5281/zenodo.7349265

README.md

@@ -147,3 +147,16 @@ for int shot_index in [0:99] {
 
 We welcome contributions to OQpy including bug fixes, feature requests, etc. To get started, check
 out our [contributing guidelines](CONTRIBUTING.md).
+
+## Citation
+
+If you use OQpy in your work or research, please cite it using the metadata in the
+[`CITATION.cff`][citation-file] file in the repository (which includes a
+[Zenodo DOI][zenodo-doi]). You can copy the citation in BibTeX format using the
+["Cite this repository" widget][citation-widget] in the About section of the
+[repository page on GitHub][github].
+
+[zenodo-doi]: https://doi.org/10.5281/zenodo.7349265
+[citation-file]: https://github.com/openqasm/oqpy/blob/main/CITATION.cff
+[citation-widget]: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-citation-files
+[github]: https://github.com/openqasm/oqpy

pyproject.toml

@@ -4,7 +4,7 @@ version = "0.1.2"
 description = "Generating OpenQASM 3 + OpenPulse in Python"
 authors = ["OQpy Contributors <[email protected]>"]
 license = "Apache-2.0"
-include = ["NOTICE"]
+include = ["CITATION.cff", "NOTICE"]
 readme = "README.md"
 repository = "https://github.com/openqasm/oqpy"
 keywords = ["openqasm", "quantum"]