fix(comp:carousel): dot clickable area is too small

[sallerli1]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

轮播图切换点击的区域太小

What is the new behavior?

利用伪元素扩大可点击区域，最小16px，最大32px

Other information

[idux-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #1590 (d4a49f2) into main (501a7b5) will decrease coverage by 0.02%.
The diff coverage is 37.50%.

❗ Current head d4a49f2 differs from pull request most recent head 2c88cc0. Consider uploading reports for the commit 2c88cc0 to get more accurate results

@@            Coverage Diff             @@
##             main    #1590      +/-   ##
==========================================
- Coverage   92.76%   92.74%   -0.02%     
==========================================
  Files         332      332              
  Lines       30699    30707       +8     
  Branches     2568     2568              
==========================================
+ Hits        28477    28480       +3     
- Misses       2222     2227       +5     

Impacted Files	Coverage Δ
packages/components/config/src/seerConfig.ts	88.46% <37.50%> (-9.27%)	⬇️