Module LiverSegments - designed as both Scriptable&Loadable module - needs refactoring

[gatangen]

Describe the bug
The design of module LiverSegments has both Python and C++ code and is initialised as a Scriptable module. It has logic code both in python and C++ which is confusion when using the module and when unit testing.

To Reproduce
Only relevant to code design.

Expected behavior
The module should be refactored to have a clear logic API in C++ and be initialised as a Loadable module.

Screenshots
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Desktop (please complete the following information):

• OS: macOS
• Version 12.6.3

Additional context
Add any other context about the problem here.

[RafaelPalomar]

The more we can translate to C++ the better (in general terms, this is what I think). We should discuss about the possibility to have Liver as a metamodule and an arena to introduce experimental changes and port these changes to C++ loadable modules.

[RafaelPalomar]

Decided on 20/03/2023 that the liver segments module should go on C++