[Github] Create a GitHub PR Template

1. Create a .github directory at the root of your project
2. Add a file called pull_request_template.md . Here's an example:

This PR...
## Changes
-
## Screenshots
(prefer animated gif)
## Checklist
- [ ] tested locally
- [ ] added new dependencies
- [ ] updated the docs
- [ ] added a test
Fixes #

Make sure these changes are on the default branch.

Open a PR and viola! See your template in action.

Dcos