fix(sheets): fix shallow copy bugs of the sheet snapshot

[karlsbeard]

• fix: change the _snapshot of the workbook to deep clone to avoid the side effects when you new an empty sheet.

[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 31.62%. Comparing base (9ab34b6) to head (b46ea93).
Report is 17 commits behind head on dev.

Files	Patch %	Lines
packages/core/src/sheets/workbook.ts	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1742      +/-   ##
==========================================
- Coverage   32.33%   31.62%   -0.72%     
==========================================
  Files         976     1044      +68     
  Lines       54152    57883    +3731     
  Branches    11284    12170     +886     
==========================================
+ Hits        17511    18305     +794     
- Misses      36641    39578    +2937     

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