add pr template

Author: cli99

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,16 @@
+# What does this PR do?
+
+<!--
+Please briefly describe your change, including what problem the change fixes, and any context
+necessary for understanding the change
+-->
+
+# What issue(s) does this change relate to?
+
+<!--
+Please include any issues related to this pull request, including 'Fixes' if the issue is resolved
+by this pull request.
+Example:
+- Fixes #42
+- Related to #1234
+-->