GitLab

* [Docs] Use PyTorch sphinx theme

* add sphinx-copybutton

* add twitter and zhihu link

* remove shpinx_rtd_theme from doc.xtx

* update docs.txt

* update conf.py

* [Refactor] Refactor the csrc directory

* update MANIFEST.in

* fix hip

* add csrc readme

* trailing whitespace

* fix syntax error in setup.py

* add compatibility docs

* move parrots_cudawarpfunction.cuh to common/cuda

* fix grammar, update directory tree

* fix MANIFEST.in

* Add new structre of csrc in compatibility.md

* Add original structre of csrc in compatibility.md

* fix typo

* remove TODO

* modify according to comment

* format
Co-authored-by: grimoire <yaoqian@sensetime.com>