Merge pull request #1577 from puppetlabs/CONT-990-Pull_Requests_template

pdksync - (CONT-990) - Adding Community Pull Requests template

Author: LukasAud

.github/pull_request_template.md

@@ -0,0 +1,15 @@
+## Summary
+Provide a detailed description of all the changes present in this pull request.
+
+## Additional Context
+Add any additional context about the problem here. 
+- [ ] Root cause and the steps to reproduce. (If applicable)
+- [ ] Thought process behind the implementation.
+
+## Related Issues (if any)
+Mention any related issues or pull requests.
+
+## Checklist
+- [ ] 🟢 Spec tests.
+- [ ] 🟢 Acceptance tests.
+- [ ] Manually verified. (For example `puppet apply`)