ops.md

## CUDA ops

We implement common CUDA ops used in detection, segmentation, etc.

- BBoxOverlaps
- CARAFE
- CrissCrossAttention
- ContextBlock
- CornerPool
- Deformable Convolution v1/v2
- Deformable RoIPool
- GeneralizedAttention
- MaskedConv
- NMS
- PSAMask
- RoIPool
- RoIAlign
- SimpleRoIAlign
- SigmoidFocalLoss
- SoftmaxFocalLoss
- SoftNMS
- Synchronized BatchNorm
- Weight standardization