Add pull request template

Author: theodorosploumis

.github/pull_request_template.md

@@ -0,0 +1,13 @@
+## Summary
+- [ ] Provide a concise overview of the change.
+- [ ] Highlight any relevant context or background information.
+
+## Testing
+- [ ] Describe the tests you ran to validate your changes.
+- [ ] Include commands executed and their results, if applicable.
+
+## Screenshots (optional)
+- [ ] Add screenshots or videos to demonstrate the change, if it affects the UI.
+
+## Additional Notes (optional)
+- [ ] Add any follow-up tasks, dependencies, or other considerations.