## Motivation

Please describe the motivation of this PR and the goal you want to
achieve through this PR.

## Modification

- add dataset-index.yml

## Dependencies

- [ ] https://github.com/open-mmlab/mim/pull/212

* [Enchancement] Delete mmcls in runtime.txt in dev-1.x

* fix mmcv minimal version

* add pyupgrade hook

* run pyupgrade precommit hook

* fix symlink failure on Windows

* fix develop mode on windows

* Upgrade CI for PyTorch1.9

* fix typo

* merge build_cu101 and build_cu102 to build_cuda

* fix substitution bug

* test

* test

* test

* test

* test

* test

* test

* test

* test

* test

* test

* test

* remove redudant items

* add python 3.9 to CI

* add python 3.9 to setup.py

* remove some versions of pytorch for python 3.9 test

* fix torch version error

* delete mim files

* update ubuntu version

* fix mmcv cuda version

* fix typo

* add citation

* Add header for files

* Delete header in config files

* support mim

* remove mim demo

* dice loss

* format code, add docstring and calculate denominator without valid_mask

* minor change

* restore

* add metafile

* add manifest.in and add config at setup.py

* add requirements

* modify manifest

* modify manifest

* Update MANIFEST.in

* add metafile

* add metadata

* fix typo

* Update metafile.yml

* Update metafile.yml

* minor change

* Update metafile.yml

* add subfix

* fix mmshow

* add more  metafile

* add config to model_zoo

* fix bug

* Update mminstall.txt

* [fix] Add models

* [Fix] Add collections

* [fix] Modify collection name

* [Fix] Set datasets to unet metafile

* [Fix] Modify collection names

* complement inference time

* Auto get version info and git hash

* bump 0.5.1 and update doc

* fixed docs

* Add change log

* fixed name in pypi, add badge

* fixed name in install.md

* update install.md

* add pypi deployment

* remove useless jobs

* fixed typo and cleanup

* delete build.tx

* add change log

Co-authored-by: Jiarui XU <xvjiarui0826@gmail.com>