refactor(slice): optimize function

[cannian1]

The Concat method and the Merge method serve essentially the same purpose, and in the slices package of Go 1.22, the same functionality is named Concat. Should one of them be deprecated?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 80.95238% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 80.82%. Comparing base (e461acd) to head (ffd9d2e).

Files	Patch %	Lines
slice/slice.go	80.95%	2 Missing and 2 partials ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##               rc     #211      +/-   ##
==========================================
- Coverage   80.84%   80.82%   -0.02%     
==========================================
  Files          65       65              
  Lines        7602     7616      +14     
==========================================
+ Hits         6146     6156      +10     
- Misses       1078     1080       +2     
- Partials      378      380       +2     

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[duke-git]

@cannian1, okay, In addition, I have added you to the list of lancet collaborators, working together to make lancet more powerful.