[Docs]: add Chinese version of config doc

[BIGWangYuDong]

This PR adds a Chinese version of the config tutorial.

[codecov]

Codecov Report

Merging #5558 (b4b7bc9) into master (b6f4366) will increase coverage by 1.11%.
The diff coverage is 64.45%.

❗ Current head b4b7bc9 differs from pull request most recent head f5f8a79. Consider uploading reports for the commit f5f8a79 to get more accurate results

@@            Coverage Diff             @@
##           master    #5558      +/-   ##
==========================================
+ Coverage   65.25%   66.36%   +1.11%     
==========================================
  Files         276      279       +3     
  Lines       21528    21962     +434     
  Branches     3560     3650      +90     
==========================================
+ Hits        14048    14576     +528     
+ Misses       6727     6632      -95     
- Partials      753      754       +1     

Flag	Coverage Δ
unittests	66.36% <64.45%> (+1.14%)	⬆️

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

Impacted Files	Coverage Δ
mmdet/core/export/pytorch2onnx.py	14.03% <ø> (ø)
mmdet/core/post_processing/bbox_nms.py	80.59% <0.00%> (ø)
mmdet/datasets/pipelines/instaboost.py	15.00% <ø> (ø)
mmdet/models/dense_heads/anchor_head.py	86.72% <ø> (ø)
mmdet/models/dense_heads/cascade_rpn_head.py	22.71% <0.00%> (ø)
mmdet/models/dense_heads/ga_rpn_head.py	22.61% <0.00%> (-0.28%)	⬇️
mmdet/models/roi_heads/mask_heads/fcn_mask_head.py	70.34% <0.00%> (+0.58%)	⬆️
mmdet/models/roi_heads/standard_roi_head.py	65.21% <ø> (+14.90%)	⬆️
mmdet/datasets/pipelines/loading.py	50.64% <16.27%> (-7.78%)	⬇️
mmdet/models/detectors/detr.py	45.45% <25.00%> (-11.69%)	⬇️
... and 42 more

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[AronLin]

Please check the space again. Some comments are just suggestions, you can decide to change or not to change according to your own thought.

[ZwwWayne]

kindly ping @BIGWangYuDong

[BIGWangYuDong]

Kindly ping @AronLin

[AronLin]

It can be approved after fixing these typos.

[AronLin]

LGTM