#122 add pull request template

.github/pull_request_template.md

@@ -0,0 +1,15 @@
+#### Check List:
+- [ ] Tests pass (`./test.sh <username>`)
+- [ ] All formatting changes by the build are committed
+- [ ] Output matches that of calculate_average_baseline.sh
+* Execution time:
+* Execution time of reference implementation:
+
+<!--
+Thanks for your submission. Please go through the checklist above before submitting your pull request.
+Use [x] to mark that the item has been completed.
+
+Please submit only submissions that are taking less than 1 minute.
+
+Please make sure that you have followed the defined rules (https://github.com/gunnarmorling/1brc?tab=readme-ov-file#rules-and-limits)
+-->