Adding HTR-PM documentation#688

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kaaldawood wants to merge 6 commits intoidaholab:develfrom

kaaldawood:htr-pm

Commits on Oct 22, 2025

move sam-htrpm files
Khaldoon Ali Mohammad Al Dawood
committed
griffin htr-pm files
Khaldoon Ali Mohammad Al Dawood
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moving sam model documentation
Khaldoon Ali Mohammad Al Dawood
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adding core multiphysics documentation
Khaldoon Ali Mohammad Al Dawood
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adding files that I modified

Khaldoon Ali Mohammad Al Dawood
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kaaldawood
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adding tests
kaaldawood
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