Enhance the Protein Rendering

[Domino2357]

The Problem
People who work with proteins need more functionality and better interaction with said functionality.

The (not exhaustive) List of Improvements

• possibility to rotate the proteins in VR
• possibility to scale proteins in VR
• being able to change to a space-filling representation during runtime
• possibility to select sidechains
• possibility to highlight specific amino acids
• widen the helices (strictly speaking an aesthetic improvement)
• correct rainbow coloring
• implement visualization for solvent-accessible surface area (see https://en.wikipedia.org/wiki/Accessible_surface_area#Shrake–Rupley_algorithm)

Additional context
Every item in the list that involves interaction needs to be available in VR as well.