chore: add PR template

Author: tilyupo

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,45 @@
+## Description
+
+<!-- Briefly describe the changes in this PR -->
+
+## Type of Change
+
+<!-- Mark the relevant option with an [x] -->
+
+- [ ] Bug fix (non-breaking change that fixes an issue)
+- [ ] New feature (non-breaking change that adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Documentation update
+- [ ] Refactoring (no functional changes)
+- [ ] Performance improvement
+
+## Affected Packages
+
+<!-- Mark the affected packages with an [x] -->
+
+- [ ] `@replanejs/sdk`
+- [ ] `@replanejs/react`
+- [ ] `@replanejs/next`
+- [ ] `@replanejs/svelte`
+
+## Related Issues
+
+<!-- Link any related issues using "Fixes #123" or "Relates to #123" -->
+
+## Checklist
+
+- [ ] I have read the [CONTRIBUTING](../CONTRIBUTING.md) guide
+- [ ] My code follows the project's coding style
+- [ ] I have added/updated tests as needed
+- [ ] All tests pass locally (`pnpm test`)
+- [ ] TypeScript types are complete and accurate
+- [ ] I have updated documentation as needed
+
+## Testing
+
+<!-- Describe how you tested these changes -->
+
+## Additional Notes
+
+<!-- Any additional information that reviewers should know -->
+