Move 'Img3D::insideForm' functionality to the core (#510)

Mikhail Svechnikovrequested to merge
m.i510a into main

Content of Img3D::insideForm is moved to IFormFactor::insideForm.

Img3D/Type/InsideForm.cpp is deleted.

IFormFactor::insideForm is ready to be used in the computational core.

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