* rm unused dir

* fix wx group

merge develop into reg

* fix logger
* fix trainer for int64 on windows

* refine tool dir

* add support for infer

* add export model support

* fix yaml

* fix post process name

* fix topk name

* add support for train and eval

* rm unsed code

* add support for metric save and load ckp

* Add __init__.py

* Fix the print info style

* Enable profiler for static training.

* Polish the initialize of ProfilerOptions.

* Enable profiler for dynamic mode.

* adapt to net.eval for the framework just contains training flag setting
* fix bug when export swin transformer

* add multi xpu support for PaddleClas about dygraph

* add dygraph multi xpu support

* fix repvgg eval

* fix dp training

* fix single card train

* fix loss reduce from dict to list

* remove note

* add find_unused_parameters param

* fix default val

* support bs>1

* Support Visual DL

* Fix VDL

* Add doc of VDL, test=document_fix

* Add the en doc of VDL, test=document_fix
Co-authored-by: Nlittletomatodonkey <2120160898@bit.edu.cn>