typing: add trivial type hints to rest of the windows platform module
Skipping the file wrappers for now because there's interplay with C code, and
making them subclass `typing.BinaryIO_Proxy` confuses PyCharm a bit.
#include <Python.h>
#if PY_MAJOR_VERSION >= 3
#define PYCODETYPE PyObject
#else
#define PYCODETYPE PyCodeObject
#endif
namespace contrib
{
void initpy(const char *cselfpath);
PyObject *pyglobals();
} /* namespace contrib */