Add a template for pull requests

Prompts author to contact [email protected] before submitting.

Author: auxesis

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,16 @@
+<!---
+🛑🛑🛑
+Have you contacted [email protected] about this change?
+
+If not, please email before creating a PR.
+--->
+
+## Summary
+
+### Changes
+
+> Please provide a summary of what's being changed
+
+## Acknowledgment
+
+By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.