Define a pr template to encourage thorough pr descriptions (CodelyTV#73)

* Define a pr template to encourage thorough pr descriptions

* Move the PR template to be under .github dir

.github/pull_request_template.md

@@ -0,0 +1,20 @@
+## What type of PR is this? (check all applicable)
+
+- [ ] Refactor
+- [ ] Feature
+- [ ] Bug Fix
+- [ ] Optimization
+- [ ] Documentation Update
+
+## Description
+_A brief description of the work covered in this change._
+
+## Notes to Reviewer
+_If there is a particular part of the code that you need the reviewer to examine closely (e.g. some logic you are not sure about), please specify here._
+
+## How to test
+_Please replace this line with instructions on how to test your changes. Use screenshots or recordings if necessary._
+
+## Link to issues addressed
+- [ISSUE-XYZ](https://github.com/CodelyTV/pr-size-labeler/issues/XYZ)
+- [ISSUE-XYZ](https://github.com/CodelyTV/pr-size-labeler/issues/XYZ)