Fix: Pandas rolling removes imaginary part of complex
- [ ] closes #46619
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.

I close this since I stuck this for long time. I not familiar much with cython part. For now, I not able to find examples to handle fused type (complex + float) I get other task which I think can complete. Thank for review.