feat(carousel): adds css theme variables

[HarperGG]

#2340

[vercel]

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[codecov]

Codecov Report

Merging #2350 (6d3313c) into main (c1c22cc) will decrease coverage by 0.16%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #2350      +/-   ##
==========================================
- Coverage   63.62%   63.45%   -0.17%     
==========================================
  Files         946      946              
  Lines       19137    19240     +103     
  Branches     4825     4871      +46     
==========================================
+ Hits        12175    12208      +33     
- Misses       5851     5883      +32     
- Partials     1111     1149      +38     

Impacted Files	Coverage Δ
src/carousel/src/Carousel.tsx	52.53% <0.00%> (-1.24%)	⬇️
src/result/src/Result.tsx	69.04% <0.00%> (-30.96%)	⬇️
src/empty/src/Empty.tsx	74.41% <0.00%> (-19.53%)	⬇️
src/descriptions/src/Descriptions.tsx	79.72% <0.00%> (-12.34%)	⬇️
src/page-header/src/PageHeader.tsx	83.72% <0.00%> (-10.88%)	⬇️
src/code/src/Code.tsx	66.66% <0.00%> (-5.89%)	⬇️
src/input-number/src/InputNumber.tsx	62.80% <0.00%> (-4.19%)	⬇️
src/log/src/Log.tsx	42.85% <0.00%> (-1.71%)	⬇️
src/watermark/src/Watermark.tsx	53.12% <0.00%> (-0.21%)	⬇️
src/form/src/FormItem.tsx	38.51% <0.00%> (ø)
... and 4 more

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[07akioni]

感觉这种用 props 之类的实现更合适一点，这变量太长了，应该抽象抽象

[HarperGG]

感觉这种用 props 之类的实现更合适一点，这变量太长了，应该抽象抽象

这样写感觉可以更加灵活的去控制高度和宽度的比例，给两个属性来控制会不会太冗余了一点，但是名字确实是有点长了。

[lgtm-com]

This pull request introduces 1 alert when merging 57e0e5b into c1c22cc - view on LGTM.com

new alerts:

• 1 for Useless conditional

[HarperGG]

@07akioni 现在这种处理呢

[07akioni]

@07akioni 现在这种处理呢

周末我看一下哈

[07akioni]

经过我一段时间的研究，最终还是决定使用 prev-slide-style 和 next-slide-style 来搞