dae/.github/PULL_REQUEST_TEMPLATE.md

<!-- NOTE: Please read the CONTRIBUTING.md guidelines before submitting your patch, and ensure you followed them all: https://github.com/daeuniverse/dae/blob/master/CONTRIBUTING.md -->

### Background

<!--- Why is this change required? What problem does it solve? -->

### Checklist

- [ ] The Pull Request has been fully tested
- [ ] There's an entry in the CHANGELOGS
- [ ] There is a user-facing docs PR against https://github.com/daeuniverse/dae

### Full Changelogs

- [Implement ...]

### Issue Reference

<!--- If it fixes an open issue, please link to the issue here. -->

Closes #_[issue number]_

### Test Result

<!--- Attach test result here. -->