Create pull_request_template

https://firetail-io.atlassian.net/browse/FIRE-983

Author: gregalia

.github/pull_request_template.md

@@ -0,0 +1,11 @@
+## Describe your changes
+
+## Issue ticket number and link
+
+## Checklist before requesting a review
+
+- [ ] I have resolved any merge conflicts
+- [ ] I have run tests locally and they pass
+- [ ] I have linted and auto-formatted the code
+- [ ] If there is new or changed functionality, I have added/updated the tests
+- [ ] If there is new or changed functionality, I have added/updated the documentation