feat(comp:tabs): support addIcon slot

[danranVm]

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?

• 文档中的滑动 Demo 有 bug, 更多浮层展开后没有数据

What is the new behavior?

• 新增了 addIcon 的插槽
• 更多浮层展开数据显示正常
  

Other information

[idux-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #1566 (d7a93c1) into main (08e1821) will not change coverage.
The diff coverage is 100.00%.

❗ Current head d7a93c1 differs from pull request most recent head e9de0e6. Consider uploading reports for the commit e9de0e6 to get more accurate results

@@           Coverage Diff           @@
##             main    #1566   +/-   ##
=======================================
  Coverage   92.78%   92.78%           
=======================================
  Files         331      331           
  Lines       30673    30673           
  Branches     3509     3509           
=======================================
  Hits        28460    28460           
  Misses       2213     2213           

Impacted Files	Coverage Δ
packages/components/tabs/src/Tabs.tsx	87.50% <100.00%> (ø)
packages/components/tabs/src/tokens.ts	100.00% <100.00%> (ø)