Improves command lines documentation and outputs

[xadupre]

No description provided.

[codecov-commenter]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (b23cddf) 83.46% compared to head (277811e) 83.82%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #108      +/-   ##
==========================================
+ Coverage   83.46%   83.82%   +0.35%     
==========================================
  Files          47       47              
  Lines        6339     6366      +27     
==========================================
+ Hits         5291     5336      +45     
+ Misses       1048     1030      -18     

Files	Coverage Δ
onnx_extended/_command_lines.py	81.06% <100.00%> (+0.06%)	⬆️
onnx_extended/tools/stats_nodes.py	83.78% <69.23%> (-1.63%)	⬇️

... and 3 files with indirect coverage changes

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