Add trust and verification options to c2pa_tool

[mauricefisher64]

Changes in this pull request

This PR adds support to configure trust features including trust anchors, allowed lists, trust store configuration and verification options.

Checklist

• [x] This PR represents a single feature, fix, or change.
• [x] All applicable changes have been documented.
• [x] 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

Attention: Patch coverage is 40.00000% with 30 lines in your changes are missing coverage. Please review.

Project coverage is 76.10%. Comparing base (3d34beb) to head (2eff902).

Files	Patch %	Lines
src/main.rs	40.00%	30 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #168 +/- ## ========================================== - Coverage 83.95% 76.10% -7.85% ========================================== Files 3 3 Lines 374 406 +32 ========================================== - Hits 314 309 -5 - Misses 60 97 +37 ```

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[crandmck]

Also @mauricefisher64 we should update the Usage section to add the new trust sub-command and options. I'd probably just mention them in the main section and tnen link down to the new section for details. I can edit the README directly in your branch if you want me to do that.

DONE