chore: init

.github/PULL_REQUEST_TEMPLATE.md

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+<!-- DO NOT IGNORE THE TEMPLATE!
+
+Thank you for contributing!
+
+Before submitting the PR, please make sure you do the following:
+
+- Read the [Contributing Guide](https://github.com/kirklin/contribute).
+- Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
+- Provide a description in this PR that addresses **what** the PR is solving, or reference the issue that it solves (e.g. `fixes #123`).
+- Ideally, include relevant tests that fail without this PR but pass with it.
+- Added necessary documentation (if appropriate)
+
+-->
+## Proposed changes
+
+<!-- Describe the big picture of your changes here to communicate to the maintainers why we should accept this pull request. If it fixes a bug or resolves a feature request, be sure to link to that issue. -->
+
+## Types of changes
+
+What types of changes does your code introduce?
+_Put an `x` in the boxes that apply_
+
+- [ ] Bugfix (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)
+- [ ] Documentation Update (if none of the other choices apply)
+
+## Linked Issues
+
+
+## Further comments
+
+<!-- If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc... -->