chore: create pull_request_template.md

.github/workflows/pull_request_template.md

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+### Proposed changes
+
+Describe the use case and detail of the change. If this PR addresses an issue on GitHub, make sure to include a link to that issue using one of the [supported keywords](https://docs.github.com/en/github/managing-your-work-on-github/linking-a-pull-request-to-an-issue) here in this description (not in the title of the PR).
+
+### Checklist
+
+Before creating a PR, run through this checklist and mark each as complete:
+- [ ] I have read the [`CONTRIBUTING`](CONTRIBUTING.md) document
+- [ ] If applicable, I have added tests that prove my fix is effective or that my feature works
+- [ ] If applicable, I have checked that any relevant tests pass after adding my changes
+- [ ] I have updated any relevant documentation