[MNT] add PR template

Author: SimonBlanke

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,37 @@
+## Description
+
+<!-- Briefly describe what this PR does -->
+
+## Related Issues
+
+<!-- Link related issues using keywords: "Fixes #123" or "Related to #456" -->
+
+## Type of Change
+
+<!-- Mark the applicable option with [x] -->
+
+- [ ] `[Fix]` - Bug fix (non-breaking change fixing an issue)
+- [ ] `[Feature]` - New feature (non-breaking change adding functionality)
+- [ ] `[Refactor]` - Code refactoring (no functional changes)
+- [ ] `[Release]` - Release preparation
+- [ ] `[Hotfix]` - Critical fix for production
+
+## How was this solved?
+
+<!-- Explain your approach to solving the issue -->
+
+## Checklist
+
+- [ ] PR title includes appropriate tag: `[Fix]`, `[Feature]`, `[Refactor]`, `[Release]`, or `[Hotfix]`
+- [ ] Linked to related issue (if applicable)
+- [ ] Code passes `make check` (lint, format, isort)
+- [ ] Tests added/updated for changes (if applicable)
+- [ ] Documentation updated (if applicable)
+
+## Testing
+
+<!-- How can reviewers verify this change works? -->
+
+## Additional Notes
+
+<!-- Any additional context, screenshots, or considerations -->