feat: pr template

Author: TotalDwarf03

.github/pull_request_template.md

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+# What type of PR is this? (check all applicable)
+
+- [ ] Refactor
+- [ ] Feature
+- [ ] Bug Fix
+- [ ] Optimization
+- [ ] Documentation Update
+
+## What
+
+Describe what you have changed and why.
+
+## Testing
+
+Have any new tests been added as part of this issue? If not, try to explain why test coverage is not needed here.
+
+- [ ] Yes
+- [ ] No
+      Please write a brief description of why test coverage is not necessary here.
+- [ ] Not as part of this ticket. (Could be done at a later point)
+
+## Documentation
+
+Has any new documentation been written as part of this issue? We should try to keep documentation up to date
+as new code is added, rather than leaving it for the future.
+
+- [ ] Yes
+- [ ] No
+      Please write a brief description of why documentation is not necessary here.
+- [ ] Not as part of this ticket. (Could be done at a later point)
+
+## Related issues
+
+Provide links to any related issues.
+
+## How to review
+
+Describe the steps required to test the changes.