add pull_request_template.md

Signed-off-by: Walker Crouse <walkercrouse@hotmail.com>

.github/pull_request_template.md

@@ -0,0 +1,13 @@
+## What
+Brief summary of these changes and their impact. The easier it is to follow and understand, the easier to review.
+
+## Why
+Reason for these changes. And why not some other changes (if applicable). Context here can be helpful when later blaming this code/reading logs.
+
+## Manual Tests
+What did you do to verify your changes?
+
+## Documentation Updates
+Did you document the purpose of any new code? Did you add comments explaining anything that might look strange to
+someone trying to figure out what your code is doing a year from now who doesn't know the full context? Is the README
+for this repo still accurate and useful?