github: add 'question' template

Our 'Bug Report' template says not to use github issues for
questions and support, but we still get lots of them.  I
think that is because the Github UI only shows available templates
or "Open a Blank Issue".  When someone goes to the new issue page
with a question, they know it is not a bug report, so they start
with the blank one and never see the disclaimer.

Create a specific Question template so that hopefully these kinds
of users will see the disclaimer.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I5a870430ca8f679d74af0cfffb74d64eb8f72fc2

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,18 @@
+---
+name: Question / Support
+about: I have a question...
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+# STOP! READ BELOW.
+
+We do not field questions or feature requests by Github Issues!
+
+Questions or feature requests should be discussed on the mailing list or
+Discord. Please see https://github.com/openbmc/openbmc#contact for info
+on how to contact us.
+
+Github Issues in openbmc/openbmc are for bugs only!