Add new snow interception modules from Alex's PhD thesis#471

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acebulsk wants to merge 7 commits intosrlabUsask:masterfrom

acebulsk:alex-ceb-thesis-changes

Commits on Oct 24, 2025

Add ClassCRHMCanopyVectorBased module for canopy snow interception calculations. This calculates the initial accumulation/interception of snow in the canopy following:
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Moved some helper functions out from `SnobalBase.cpp` to `SnobalDefines.h` so they can be shared with the new `CanopySnowBalance` module. Snobal functionality remains the same.
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Add ClassCanopySnowBalanceBase and ClassCanopySnowBalanceCRHM modules which provide physically-based methods to handle the mass and energy balance of snow intercepted in the canopy following:
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Added check to avoid always going into mixed snow/rain routines since the Harder method typically returns non zero even for warm/cold temps.
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Modify cpp files to incorporate new CRHM modules `CanopyVectorBased` and `CanopySnowBalance`
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Commits on Nov 25, 2025

minor change
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Commits on Dec 4, 2025

update unloading coefs to use new coefficients after handling heteroscadesticity with generalised linear regression
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