Different activation functions for chamber sphere

[charoheijnen]

Problem

we can inly use a single activation funciton defined within chmaber sphere. We want to be able to use all possible activation functions within ActivationFunction.cpp.

Solution

Modify ChamberSphere to include function call to activation function from ActivationFunction.cpp. Also add current activation funciton from ChamberSphere to ActivationFunction.cpp

Additional context

No response

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