Add Copy option to Audio Codec. Add Crop option to Arguments

[brett-baker]

Added copy option to the available audio codecs.

Added basic crop functionality to the to the available arguments.

upgraded system.text.json version to 7.0.3.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.

Project coverage is 70.70%. Comparing base (f8407bc) to head (5d654af).
Report is 75 commits behind head on main.

Files with missing lines	Patch %	Lines
FFMpegCore/FFMpeg/Arguments/CropArgument.cs	0.00%	8 Missing ⚠️
FFMpegCore/FFMpeg/FFMpegArgumentOptions.cs	0.00%	4 Missing ⚠️
FFMpegCore/FFMpeg/Enums/Enums.cs	0.00%	2 Missing ⚠️
FFMpegCore/FFProbe/MediaAnalysis.cs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #546      +/-   ##
==========================================
- Coverage   74.31%   70.70%   -3.62%     
==========================================
  Files         113      116       +3     
  Lines        2854     2942      +88     
  Branches        0      279     +279     
==========================================
- Hits         2121     2080      -41     
- Misses        733      754      +21     
- Partials        0      108     +108     

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