Initial fragment support

[mauricefisher64]

Changes in this pull request

New commands to add and validate BMFF fragmented assets. Support for globing to enables processing of complete DASH hierarchies.

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.

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Codecov Report

Attention: Patch coverage is 19.10112% with 72 lines in your changes missing coverage. Please review.

Project coverage is 47.89%. Comparing base (17863bd) to head (7074054).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
src/main.rs	19.10%	72 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #230      +/-   ##
==========================================
- Coverage   48.68%   47.89%   -0.79%     
==========================================
  Files           4        4              
  Lines         684      666      -18     
==========================================
- Hits          333      319      -14     
+ Misses        351      347       -4     

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[gpeacock]

We should move the sign_fragment and verify_fragment to a fragment.rs file, but since e need to restructure everything for subcommands anyway, no need to do that now.

[Xueeeeeeee]

Hello, I got an error message (Error: glob patterns only allowed when using "fragment" command) when adding a manifest to a JPG since upgrated to v 0.9.8. I had no problem with the v 0.9.7 and the same JPG. Could this be a regression in version 0.9.8? Thanks a lot. Regards,Xue