Create PULL_REQUEST_TEMPLATE.md

Author: Pnwcomputers

.github/PULL_REQUEST_TEMPLATE.md

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+## Summary
+Explain what this PR changes and why.
+
+## Type of change
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Docs update
+- [ ] Refactor
+- [ ] Other (describe):
+
+## Checklist
+- [ ] I ran tests locally and they pass
+- [ ] I updated docs/README as needed
+- [ ] I linked related issues (e.g., fixes #123)
+- [ ] I followed the coding style & conventions
+
+## Screenshots / Demos
+If applicable.
+
+## Breaking changes
+Describe any breaking changes and migration steps.