docs: add pull request template to repo

Author: sweeetland

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,7 @@
+# Context
+
+_Reason for the change? If an issue exists, reference it here using a [keyword](https://docs.github.com/en/github/managing-your-work-on-github/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword)_
+
+# Proposed Solution
+
+# Important Changes Introduced