* refactor ext op and add matched rbox iou

* replace rbox_iou_ops with ext_op

* [Dy2St]Fix cascade_rcnn export model problem

* [Dy2St]Fix cascade_rcnn export model problem

* add cascade vitdet

* cascade vit

* fix for model export

* add vit cascade cfgs

cast dtype in load_pretrain_weight

* add stage_loss_weights

* add reg_class_agnostic

* add loss_rpn_bbox

* support eager all_reducer return value

* revert file

* fix error logic

* support simota head in eager

* clean fluid

* mv static to legacy

* remove yolo box

* revert legacy dir

* revert static link

* update in_dynamic_mode

* clean iou_similarity, collect_fpn_proposals, bipartite_match

* add exclude_nms and trt silu for yolox

* fix silu act, fix readme

* fix class init when import ppdet files

* add nms trt support

* add check version code

* fix bugs

* support rcnn onnx

* clean code

* update cascade rcnn

* add todo for rpn proposals

* support nms options when export model

* fix config

* Add PP-YOLOE yaml

* rename PP-YOLOE

* Add exclude_nms in ppyoloe_head

* rename pretrain_weights

* [ppyolov3] add ppyolov3 base code

* add ppyolov3 s/m/x

* modify ema

* modify code to convert onnx successfully

* support arbitrary shape

* update config to use amp default

* refine ppyolo_head code

* modify reparameter code

* refine act layer

* adapter pico_head and tood_head code

* remove ppyolov3 yaml

* fix codestyle
Co-authored-by: Nwangxinxin08 <wangxinxin08@baidu.com>

* add a new version code of PicoDet

* add implementation of RetinaNet

* * add README.md and model zoo
* rename FOCSFeat -> RetianFeat
* add mstrain model to model zoo
* refactor DeltaBBoxCoder

* update link for model and log

* fix problem of s2anet while deploying

* correct problem of s2anet TestReader

* add dota default category