[Doc] Add tutorials/customize_models.md Chinese version

[wHao-Wu]

• Add tutorials/customize_models.md Chinese version

[codecov]

Codecov Report

Merging #820 (e2d9831) into master (43b4632) will increase coverage by 0.29%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #820      +/-   ##
==========================================
+ Coverage   49.03%   49.33%   +0.29%     
==========================================
  Files         210      210              
  Lines       15964    16021      +57     
  Branches     2547     2556       +9     
==========================================
+ Hits         7828     7904      +76     
+ Misses       7634     7614      -20     
- Partials      502      503       +1     

Flag	Coverage Δ
unittests	49.33% <ø> (+0.29%)	⬆️

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

Impacted Files	Coverage Δ
mmdet3d/core/bbox/structures/utils.py	80.51% <0.00%> (-16.63%)	⬇️
mmdet3d/datasets/s3dis_dataset.py	88.57% <0.00%> (-6.10%)	⬇️
mmdet3d/apis/inference.py	43.21% <0.00%> (-0.85%)	⬇️
mmdet3d/models/fusion_layers/point_fusion.py	64.44% <0.00%> (-0.78%)	⬇️
mmdet3d/datasets/nuscenes_mono_dataset.py	37.08% <0.00%> (-0.39%)	⬇️
mmdet3d/models/dense_heads/centerpoint_head.py	44.55% <0.00%> (-0.19%)	⬇️
mmdet3d/__init__.py	81.48% <0.00%> (ø)
mmdet3d/apis/test.py	15.78% <0.00%> (ø)
mmdet3d/apis/train.py	50.00% <0.00%> (ø)
mmdet3d/ops/__init__.py	100.00% <0.00%> (ø)
... and 164 more

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[Tai-Wang]

Almost ready to merge

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All committers have signed the CLA.

[Wuziyi616]

Good job