Adds implementation of LargeModels into a single file.

[xadupre]

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 87.93103% with 21 lines in your changes missing coverage. Please review.

Project coverage is 84.50%. Comparing base (5004ce6) to head (4c1425e). Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
onnx_extended/helper/large_helper.py	87.93%	21 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #107      +/-   ##
==========================================
- Coverage   84.71%   84.50%   -0.22%     
==========================================
  Files          58       59       +1     
  Lines        7060     7293     +233     
==========================================
+ Hits         5981     6163     +182     
- Misses       1079     1130      +51     

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