chore: add pull request template

Author: Sunhaiy

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,23 @@
+## Summary
+
+<!-- Briefly describe what this pull request changes. -->
+
+## Type of change
+
+- [ ] Bug fix
+- [ ] New feature
+- [ ] UI/UX improvement
+- [ ] Refactor
+- [ ] Documentation
+- [ ] Build or release change
+
+## Checklist
+
+- [ ] I have tested the change locally.
+- [ ] I have checked that the app still builds.
+- [ ] I have updated documentation if needed.
+- [ ] I have added screenshots or notes for UI changes if helpful.
+
+## Notes
+
+<!-- Add rollout notes, known risks, or anything reviewers should pay attention to. -->