Update to the article Orbitals of a Hydrogen atom

In chemistry, orbitals are often visualized as isosurfaces, which are surfaces of constant value representing the probability density of finding an electron. Since this concept commonly appears in various contexts of chemistry, I added a section to the article Orbitals of a Hydrogen atom that represents one way to plot isodensity surfaces for hydrogenic orbitals. While this additional section demonstrates a “pythonic” approach to draw 3d surface of electron density, it is not considered as the conventional method typically used in the chemical context for representing isosurfaces.