Get help text

[kwabenantim]

Summary

Retrieve Python help text from C++ docstrings.

Useful docs:

• https://pybind11.readthedocs.io/en/stable/advanced/misc.html#generating-documentation-using-sphinx

[kwabenantim]

Currently, Python help text is empty. For example:

.def("bar", double &Foo, " " )  // help text should be in the blank " "

If the C++ code has an attached docstring, it would be useful to read it into the class or function wrapper definition.