Two hill activation function and separate activation function class#215

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aabrown100-git wants to merge 10 commits intoSimVascular:masterfrom

aabrown100-git:two-hill-activation-function

Commits on Feb 13, 2026

Initial commit. Implements ActivationFunction with half cosine, piecewise cosine, and two hill activation functions. ActivationFunction is created in SimulationParameters.cpp and associated with a …
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Commits on Feb 17, 2026

Refactor to simplify parameter handling. Separate parameters from input parameter properties
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Commits on Feb 18, 2026

Remove redundant activation parameter validation in set_param(). Now, rely on validation in SimulationParameters::generate_activation_function, which calls set_param()
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