Create pull_request_template.md

Author: tabacitu

.github/pull_request_template.md

@@ -0,0 +1,27 @@
+## WHY
+
+### BEFORE - What was wrong? What was happening before this PR?
+
+??
+
+### AFTER - What is happening after this PR?
+
+??
+
+
+## HOW
+
+### How did you achieve that, in technical terms?
+
+??
+
+
+
+### Is it a breaking change or non-breaking change?
+
+??
+
+
+### How can we test the before & after?
+
+??