Add pull request template

Author: Sytten

.github/pull_request_template.md

@@ -0,0 +1,13 @@
+### Issue # (if available)
+
+<!--  **Please post the link to the resolved issue** -->
+
+### Description of changes
+
+<!-- **Please explain what your changes does** -->
+
+### Checklist
+
+- [ ] Added change to the changelog
+- [ ] Created unit tests for my feature (if needed)
+- [ ] Created a least one integration test