[Feature Request] DPLR in PyTorch backend

### Summary

Dear developers,

I have developed [DPLR in PyTorch backend](https://github.com/ChiahsinChu/torch-dplr) in the plugin mode. This implementation has passed tests and been ready to use. The reason I have not started a PR to the main repository is that:
1. This implementation depends on two PRs (#4661 and #4628).
2. This implementation depends on a third-party package [torch-admp](https://github.com/ChiahsinChu/torch-admp) for PME calculation.

I would like to know your suggestions about this feature, keeping it as a stand-alone plugin or merging it to the main repository.

Best regards.

### Detailed Description

See above.

### Further Information, Files, and Links

_No response_