add pull request template

.github/pull_request_template.md

@@ -0,0 +1,13 @@
+
+### Intent
+
+> Describe briefly what problem this pull request resolves, or what new feature it introduces. Link to any Github issues that are related. 
+
+### Approach
+
+> Describe the approach taken and the tradeoffs involved if non-obvious; add an overview of the solution if it's complicated.
+
+### QA Notes
+
+> Add additional information for QA on how to validate the change, paying special attention to the level of risk, adjacent areas that could be affected by the change, and any important contextual information not present in the linked issues. 
+