Patch issue 173

[bammari]

This path is to fix the bug found in issue 173. If a user passes a scaler and scaled input bounds when creating a LinearTreeDefinition, unscaled input bounds will be calculated.

If only scaled input bounds are provided, unscaled input bounds will remain None.

No output bounds will be assigned to unscaled output vars if unscaled input bounds is None.

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[codecov]

Codecov Report

Attention: Patch coverage is 93.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 91.17%. Comparing base (dfe44bd) to head (1be31c4).

Files with missing lines	Patch %	Lines
src/omlt/linear_tree/lt_formulation.py	80.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #175      +/-   ##
==========================================
- Coverage   91.17%   91.17%   -0.01%     
==========================================
  Files          39       39              
  Lines        3320     3331      +11     
  Branches      509      512       +3     
==========================================
+ Hits         3027     3037      +10     
  Misses        185      185              
- Partials      108      109       +1     

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