Add a pull request template (#353)

.github/PULL_REQUEST_TEMPLATE/pull_request_template.md

@@ -0,0 +1,28 @@
+## Description
+
+<!-- Please include a summary of the change. Any relevant motivation or context is also helpful, as well as any dependencies that are required for this change -->
+
+## Related Issue
+
+<!--- This project prefers to accept pull requests related to open issues -->
+<!--- If suggesting a new feature or change, please discuss it in an issue first -->
+<!--- If fixing a bug, there should be an issue describing it with steps to reproduce -->
+
+Fixes # (issue)
+
+## Type of change
+
+<!-- Please delete options that are not relevant -->
+
+- [ ] Bug fix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+
+## Checklist before merging
+
+<!-- Please delete options that are not relevant -->
+
+- [ ] Tests have been added/updated as necessary (add the `needs-tests` label)
+- [ ] Documentation has been updated as necessary (add the `needs-docs` label)
+- [ ] An ADR has been written as necessary (add the `needs-adr` label) [ [1](https://github.com/joelparkerhenderson/architecture-decision-record) [2](https://cognitect.com/blog/2011/11/15/documenting-architecture-decisions) [3](https://adr.github.io/) ]
+- [ ] (Optional) Changes have been linted locally with [golangci-lint](https://github.com/golangci/golangci-lint). (NOTE: We haven't turned on lint checks in the pipeline yet so linting may be hard if it shows a lot of lint errors in places that weren't touched by changes. Thus, linting is optional right now.)