chore: add pull request template

Author: kombucha

.github/pull_request_template.md

@@ -0,0 +1,14 @@
+## 🤔 What
+_Describe what is being changed/added/reworked (you can use lists)._
+
+## 🤷 Why
+_Give context around why we're making the change._
+
+## 🔍 How
+_Describe how we're implementing the change._
+
+## 🧪 Testing
+_Additional instructions needed to test the changes._
+
+## 📸 Previews
+_Add screenshots to get a taste of the changes._