Add SUPPORT.md

Author: mhucka

SUPPORT.md

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+# Support
+
+Thank you for your interest in this project! If you are experiencing problems
+or have questions, the following are some suggestions for how to get help.
+
+> [!NOTE]
+> Before participating in our community, please read our [code of
+> conduct](CODE_OF_CONDUCT.md). By interacting with this repository,
+> organization, or community, you agree to abide by its terms.
+
+## Report an issue or request a feature
+
+To report an issue or request a feature, please first search the [issue tracker
+on GitHub](https://github.com/quantumlib/OpenFermion-FQE/issues) to check if
+there is already an open issue identical or similar to your bug report/feature
+request. If there is none, go ahead and file a new issue in the issue tracker.
+
+## Contact the maintainers
+
+For any questions or concerns not addressed here, please email
+[quantum-oss-maintainers@google.com](mailto:quantum-oss-maintainers@google.com).