Stabilize Skia snapshots and improve CI setup

[zhiqingchen]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 80.34188% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.48%. Comparing base (643df08) to head (4c669a8).
⚠️ Report is 35 commits behind head on main.

Files with missing lines	Patch %	Lines
src/svg/SVGCore.ts	7.14%	13 Missing ⚠️
src/skia/painter.tsx	89.83%	6 Missing ⚠️
src/skia/skiaChart.tsx	90.00%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #293       +/-   ##
===========================================
+ Coverage   40.41%   73.48%   +33.06%     
===========================================
  Files          18       18               
  Lines         725      807       +82     
  Branches      213      237       +24     
===========================================
+ Hits          293      593      +300     
+ Misses        432      214      -218     

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