[Fix] Fix ignore class id from -1 to 255 in BaseSegDataset in 1.x

Fixe the bug in the visualization step.

[Enhancement] Support padding in testing

[Fix] Fix typo of BaseSegDataset docstring

[Fix] Fix swin load state_dict

[Fix] fix lint and pre-commit

Add MMEval projects like in README

[Doc] Update transforms Doc

Merge MMSegmentation 1.x development branch dev-1.x to main branch 1.x

Bump V1.0.0rc1

Sync 1.x

* [Enhancement] Fix ci for 1.x

* circle ci

* lint and engien

* typo

* typo

* mim install mmcv

* python -m pip

* python -m pip

* python -m pip

* remove pt1.5

* remove pt1.5

* ignore high memory in win

* fix win and lint

* fix lint

* fix lint

* fix lint

* win

* win

* [Fix] circle ci

* importlib

* python -m mim

* python -m cpverage

* typo

* Update config documentation

* add demos

* update examples

* update links