feat: add start end

[xrkffgg]

ant-design/ant-design#27798

月初 月末 加了额外的 className

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[codecov]

Codecov Report

Merging #175 (3f17f62) into master (49704a8) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #175   +/-   ##
=======================================
  Coverage   99.60%   99.60%           
=======================================
  Files          45       45           
  Lines        2008     2023   +15     
  Branches      587      588    +1     
=======================================
+ Hits         2000     2015   +15     
  Misses          6        6           
  Partials        2        2           

Impacted Files	Coverage Δ
src/generate/dateFns.ts	100.00% <100.00%> (ø)
src/generate/dayjs.ts	100.00% <100.00%> (ø)
src/generate/moment.ts	100.00% <100.00%> (ø)
src/panels/PanelBody.tsx	100.00% <100.00%> (ø)
src/utils/timeUtil.ts	100.00% <100.00%> (ø)

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[afc163]

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