[Docs] Add support page for issues, requests, and questions (#3835)

To increase user feedback and make it clear how to report issues on the website.

cc @balopat @lamberta @karlunho 

Note: Cirq is the only repo with issue templates.

docs/_book.yaml

@@ -67,6 +67,8 @@ upper_tabs:
         path: /cirq/custom_gates
       - title: "Operators and observables"
         path: /cirq/operators_and_observables
+      - title: "Issues / requests / questions"
+        path: /cirq/support
 
       ####  Contributor Guide  ####
       - heading: "Contributor guide"

docs/support.md

@@ -0,0 +1,29 @@
+# Report an issue or request a feature
+
+| Project | Issue tracker | 
+|---------|--------------------|
+| Cirq | https://github.com/quantumlib/Cirq/issues | 
+| OpenFermion | https://github.com/quantumlib/OpenFermion/issues | 
+| ReCirq | https://github.com/quantumlib/ReCirq/issues |
+| qsim | https://github.com/quantumlib/qsim/issues | 
+| Tensorflow Quantum |https://github.com/tensorflow/quantum/issues |
+
+To report an issue or request a feature in our open-source projects, 
+first check if there is already an open issue for your bug report / 
+feature request at the links above. If not, file an issue by following 
+the provided template and/or contributing guidelines. Thanks for helping
+improve open-source quantum software!
+
+# Questions
+
+If you're not sure whether a certain behavior is buggy, or if you have other questions,
+please ask us in the [Cirq Gitter channel](https://gitter.im/cirqdev). 
+
+# Weekly developer meetings
+
+You may also be interested to join the weekly 
+[Cirq sync](https://groups.google.com/g/cirq-dev) with Cirq developers and 
+contributors. There are also weekly syncs for 
+[OpenFermion](https://groups.google.com/g/openfermion-dev),
+[qsim](https://groups.google.com/g/qsim-qsimh-dev), and
+[TensorFlow Quantum](https://groups.google.com/g/openfermion-dev).