add the ability to specify a shading context when running an eplus model

[szvsw]

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[codecov-commenter]

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Codecov Report

❌ Patch coverage is 47.82609% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.1%. Comparing base (040d0c5) to head (562ca70).

Files with missing lines	Patch %	Lines
epinterface/geometry.py	47.8%	7 Missing and 5 partials ⚠️
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Additional details and impacted files

@@           Coverage Diff           @@
##            main     #65     +/-   ##
=======================================
- Coverage   64.1%   64.1%   -0.1%     
=======================================
  Files         34      34             
  Lines       4980    5001     +21     
  Branches     447     452      +5     
=======================================
+ Hits        3197    3207     +10     
- Misses      1634    1641      +7     
- Partials     149     153      +4     

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