docs(github): add pr template

this commit will also trigger a major release: 2.7.0 should have been 3.0.0

BREAKING CHANGE: trigger major release

.github/pull_request_template.md

@@ -0,0 +1,21 @@
+<!-- Title of PR should use a standard commit prefix (feat, fix, chore, etc.) followed by an optional context ((components), (linting), etc), and a succinct description. I.E. feat(components): add MyFancyComponent -->
+
+<!-- Does not have to match PR title. I.E. MyFancyComponent -->
+# {Insert short title}
+
+<!-- What is the rationale for the changes? -->
+## Background
+- a
+- b
+- c
+
+<!-- What is the description of the changes? -->
+## Description
+- Adds this
+- Removes that
+
+## Acceptance Criteria
+<!-- What are the steps to test the changes? -->
+1. a
+2. b
+3. c