feat(comp:menu): add overlayDelay prop and menu item support custom suffix

[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?

What is the new behavior?

• 支持自定义 overlayDelay, fix [comp:menu] 悬浮菜单的显示隐藏速度太拖拉，需要可配置 #1292
• MenuItem 新增 suffix 配置
• indent 默认值从 24 修改为 16
• 同步设计规范，支持 css variable

Other information

[idux-bot]

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[codecov]

Codecov Report

Merging #1300 (7d18e98) into main (e08acf6) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 7d18e98 differs from pull request most recent head 771f036. Consider uploading reports for the commit 771f036 to get more accurate results

@@           Coverage Diff           @@
##             main    #1300   +/-   ##
=======================================
  Coverage   93.04%   93.04%           
=======================================
  Files         322      322           
  Lines       29821    29824    +3     
  Branches     3366     3366           
=======================================
+ Hits        27746    27749    +3     
  Misses       2075     2075           

Impacted Files	Coverage Δ
packages/components/alert/src/Alert.tsx	100.00% <100.00%> (ø)
packages/components/alert/src/types.ts	100.00% <100.00%> (ø)
packages/components/config/src/defaultConfig.ts	100.00% <100.00%> (ø)
packages/components/config/src/seerConfig.ts	97.50% <100.00%> (ø)
packages/components/menu/src/types.ts	100.00% <100.00%> (ø)

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