Add a contact page

_data/navigation.yml

@@ -12,3 +12,5 @@ main:
     url: /contributing
   - title: "Working Papers"
     url: /wp
+  - title: "Contact"
+    url: /contact

contact.md

+---
+title: Contact
+---
+<br />
+
+Here are the various contact points of the Dynare Team. Please make sure to use
+the one that best corresponds to your request.
+
+- Our main support channel is the [Dynare forum](https://forum.dynare.org). All
+  questions about the usage of Dynare should go there. More general questions
+  related to macroeconomic modelling are also welcome.
+
+- Bugs should be reported by opening a new issue on our [issue
+  tracker](https://git.dynare.org/Dynare/dynare/-/issues). Note that you will
+  have to create an account on our Gitlab instance. If you have encountered a
+  problem with Dynare, but are unsure whether it is really a bug, please ask on
+  the forum first before opening an issue.
+
+- Small code contributions can directly be submitted via a new [merge
+  request](https://git.dynare.org/Dynare/dynare/-/merge_requests). Large code
+  contributions should first be discussed by writing to
+  [dev@dynare.org](mailto:dev@dynare.org); beware, this is a publicly-archived
+  mailing list.
+
+- Inquiries about the Dynare Conference should go to
+  [conference@dynare.org](mailto:conference@dynare.org).
+
+- Inquiries about the Dynare Summer School should go to
+  [school@dynare.org](mailto:school@dynare.org).
+
+- Submissions to the Dynare Working Paper Series should be sent to
+  [wp@dynare.org](mailto:wp@dynare.org).
+  
+- Requests that do not fall in any of the above categories should be sent to
+  [contact@dynare.org](mailto:contact@dynare.org).