mmpretrain
* [Feature] Support ConvNeXt-V2. * Use registry of mmcls instead of mmengine. * Add README. * Add unit tests and docs.
* Support Activation Checkpointing for ConvNeXt * Add docstring. Co-authored-by: mzr1996 <mzr1996@163.com>
* Support ConvNeXt * Add configs of ConvNeXt * Update dev scripts * Update docs. * Use new style README * Add unit tests. * Update README * Imporve according to comments * Modify refers to timm. * Imporve according to comments