Ingredient thumbnails, extension cleanup, toolkit update

[gpeacock]

Thumb and extension fixes fix ingredient thumbnail loading remove manifest preview feature test for similar extensions update c2pa-rs Add svg support

Changes in this pull request

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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 #120 (faa1def) into main (25d0f41) will increase coverage by 3.64%. The diff coverage is 82.60%.

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@@            Coverage Diff             @@
##             main     #120      +/-   ##
==========================================
+ Coverage   77.38%   81.02%   +3.64%     
==========================================
  Files           3        3              
  Lines         367      369       +2     
==========================================
+ Hits          284      299      +15     
+ Misses         83       70      -13     

Impacted Files	Coverage Δ
src/main.rs	80.25% <82.60%> (+5.79%)	:arrow_up:

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