[Enhancement] Add win-ci

[MeowZheng]

Modification

• Add win-ci in .github/workflows/build.yml

ref pr: open-mmlab/mmagic#732

[codecov]

Codecov Report

Merging #92 (a7cd26a) into master (62cc403) will increase coverage by 0.14%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #92      +/-   ##
==========================================
+ Coverage   67.74%   67.89%   +0.14%     
==========================================
  Files          86       86              
  Lines        4895     4896       +1     
  Branches      705      705              
==========================================
+ Hits         3316     3324       +8     
+ Misses       1471     1464       -7     
  Partials      108      108              

Flag	Coverage Δ
unittests	67.89% <100.00%> (+0.14%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmflow/datasets/flyingthings3d_subset.py	87.87% <100.00%> (+0.12%)	⬆️
mmflow/datasets/pipelines/transforms.py	78.66% <0.00%> (+1.16%)	⬆️

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