nydusify(feat): add crc32 in file attributes

[BraveY]

Read CRC32 from external models' manifest and pass it to builder.

Relevant Issue (if applicable)

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Details

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Types of changes

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

Go over all the following points, and put an x in all the boxes that apply.

• I have updated the documentation accordingly.
• I have added tests to cover my changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.35%. Comparing base (96c3e55) to head (e8856d5).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1683      +/-   ##
==========================================
+ Coverage   55.34%   55.35%   +0.01%     
==========================================
  Files         197      197              
  Lines       55706    55720      +14     
  Branches    47176    47176              
==========================================
+ Hits        30828    30845      +17     
+ Misses      23277    23275       -2     
+ Partials     1601     1600       -1     

Files with missing lines	Coverage Δ
contrib/nydusify/pkg/converter/converter.go	66.16% <100.00%> (+0.08%)	⬆️
contrib/nydusify/pkg/external/modctl/remote.go	64.58% <100.00%> (+5.80%)	⬆️
...dusify/pkg/snapshotter/external/backend/backend.go	100.00% <ø> (ø)
...trib/nydusify/pkg/snapshotter/external/external.go	53.60% <100.00%> (ø)

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[imeoer]

Others LGTM, thanks!

[imeoer]

Thanks, LGTM!