fix: add PR template

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,35 @@
+## Motivation and context for the change
+
+<!--
+Describe the motivation against creating this change and, if applicable, describe the current behavior and any relevant screenshots or diagrams (if applicable).
+-->
+
+## A clear description of the change
+
+<!--
+Describe the change, including new behavior, possible impacts, and any relevant screenshots or diagrams (if applicable).
+-->
+
+## Testing
+
+<!--
+Inform whether or not the change is covered with automated tests.
+-->
+
+- [ ] The change is covered with automated tests
+
+#### Testing instructions
+
+<!--
+If the change isn't covered with automated tests, provide a detailed list of steps for the reviewer to test it. You may remove this section in case of automated tests.
+-->
+
+## Rollback
+
+- [ ] The change can be automatically rolled back
+
+#### Rollback instructions
+
+<!--
+If the rollback cannot be performed automatically, provide a detailed list of the steps needed to complete a rollback. Add any relevant link to the documentation if applicable. You may remove this section in case of support for automated rollback.
+-->