Add github template chooser

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,11 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Feature Request
+    url: https://github.com/outline/outline/discussions/new
+    about: Request a feature to be added to the project
+  - name: Self Hosting Questions
+    url: https://github.com/outline/outline/discussions/new
+    about: Ask questions and discuss running Outline with community members
+  - name: Hosted Support
+    url: mailto:hello@getoutline.com
+    about: Get support with your team account on getoutline.com