feat(cdk:countdown): add useCountdown method

[liuzaijiang]

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?

cdk新增倒计时方法

Other information

[idux-bot[bot]]

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[codecov[bot]]

Codecov Report

Merging #1604 (1e6bd7b) into main (f68df61) will increase coverage by 0.01%. The diff coverage is 96.42%.

:exclamation: Current head 1e6bd7b differs from pull request most recent head 2e9d6f7. Consider uploading reports for the commit 2e9d6f7 to get more accurate results

@@            Coverage Diff             @@
##             main    #1604      +/-   ##
==========================================
+ Coverage   92.56%   92.58%   +0.01%     
==========================================
  Files         338      339       +1     
  Lines       31541    31681     +140     
  Branches     3602     3626      +24     
==========================================
+ Hits        29197    29332     +135     
- Misses       2344     2349       +5     

Impacted Files	Coverage Δ
packages/cdk/countdown/src/useCountdown.ts	96.37% <96.37%> (ø)
packages/components/icon/src/dependencies.ts	99.13% <100.00%> (+0.01%)	:arrow_up: