Code cleaning

Summary:
Core change: Two Guards around static variables in TimeSlicedGeometry. Part is not included if SWIG-Wrapping is active.

They are needed for two reasons: 1.) SWIG can't handle "static const", only "const static". 2) With the correct order, a linker error occurs.
The change should not affect any other interface/code part.

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Code cleaning

Changed the name from PythonMITK to pyMITK

Added additional classes (Geometry-related stuff)

Added additional Classes

Simplified Interface

Test Plan: Test if compiling, it does. (Only small core change)

Reviewers: O1 MITK Core, kislinsk

Reviewed By: O1 MITK Core, kislinsk

Subscribers: kislinsk

Maniphest Tasks: T24046

Differential Revision: https://phabricator.mitk.org/D107