Generate stub files for Python bindings

[KingaJanicka]

Is your feature request related to a problem? Please describe!
The python build process does not generate stub files, meaning developers using VS Code don't get autocomplete or inline documentation.

Describe the solution you'd like:
Running pybind11-stubgen surgepy and moving the contents of stubs/surgepy to inside the site-packages surgepy directory results in quite nice inline documentation. This should be added to build process, PR forthcoming.

Describe alternatives you've considered:
Tried to generate using mypy stubgen but it didn't work.

[baconpaul]

Oh cool! Please add yourself to AUTHORS when you pr since this will be your first pr.