Add citation files

src/data/roadmaps/git-github/content/citation-files@Ddkss13_qDJTquDHbVTVs.md

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+# CITATION files
+
+You can add a CITATION.cff file to the root of a repository to let others know how you would like them to cite your work. The citation file format is plain text with human- and machine-readable citation information.
+
+Visit the following resources to learn more:
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+- [@official@CITATION Files Documentation](https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-citation-files)