Create pull_request_template.md

Author: josh-wong

.github/pull_request_template.md

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+## Description
+
+> Replace this text with a brief description about **why** this PR is necessary. Be sure to provide context.
+
+## Related issues and/or PRs
+
+> Replace this text with links to any existing issues and/or PRs. Or, write `N/A` if no related issues and/or PRs exist.
+
+## Changes made
+
+> Replace this text with an outline the specific changes made in this pull request in the form of a bulleted list. Include relevant details, such as added features, bug fixes, code refactoring, or improvements.
+
+<h2 id="checklist">Checklist</h2>
+
+The following is a best-effort checklist. If any items in this checklist aren't applicable to this PR, add `N/A` after each item.
+
+### Documentation
+
+- [ ] I have updated the side navigation as necessary.
+- [ ] I have updated the documentation to reflect the changes.
+- [ ] I have documented or updated any remaining open issues linked to this PR in GitHub, Obsidian, etc.
+
+### Build, deploy, and test
+
+- [ ] I have merged and published any dependent changes in other PRs.
+- [ ] I have commented my code, particularly in hard-to-understand areas.
+- [ ] I have checked that my changes look as expected on a locally built version of the docs site.
+- [ ] My changes generate no new warnings.