Box hash support

[mauricefisher64]

Changes in this pull request

Support for C2PA 1.3 box hashing. Only available for JPEG and PNG.

Checklist

• This PR represents a single feature, fix, or change.
• All applicable changes have been documented.
• Any TO DO items (or similar) have been entered as GitHub issues and the link to that issue has been included in a comment.

[codecov-commenter]

Codecov Report

Merging #261 (ecd86a4) into main (b29cc1c) will increase coverage by 0.17%.
The diff coverage is 82.15%.

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@@            Coverage Diff             @@
##             main     #261      +/-   ##
==========================================
+ Coverage   77.67%   77.85%   +0.17%     
==========================================
  Files          74       75       +1     
  Lines       20972    21700     +728     
==========================================
+ Hits        16291    16895     +604     
- Misses       4681     4805     +124     

Impacted Files	Coverage Δ
sdk/src/assertions/labels.rs	82.60% <ø> (ø)
sdk/src/asset_io.rs	54.28% <0.00%> (-5.09%)	⬇️
sdk/src/claim.rs	81.39% <27.58%> (-3.56%)	⬇️
sdk/src/assertions/bmff_hash.rs	19.85% <66.66%> (ø)
sdk/src/asset_handlers/png_io.rs	93.26% <76.74%> (-1.33%)	⬇️
sdk/src/store.rs	87.11% <84.13%> (-0.27%)	⬇️
sdk/src/asset_handlers/jpeg_io.rs	91.78% <90.86%> (-0.41%)	⬇️
sdk/src/assertions/box_hash.rs	91.74% <91.74%> (ø)
sdk/src/assertions/data_hash.rs	84.68% <100.00%> (ø)
sdk/src/ingredient.rs	84.33% <100.00%> (ø)
... and 3 more

[brogdonm]

Hey @mauricefisher64 thanks for this work, I was going through here to understand how it was implemented. I have a few questions in areas I'm unsure of. If I'm totally off base, please ignore. ;)

[gpeacock]

Added some questions about how this works