Issue #16129: Add `Py_SetStandardStreamEncoding` This new pre-initialization API allows embedding applications like Blender to force a particular encoding and error handler for the standard IO streams. Also refactors Modules/_testembed.c to let us start testing multiple embedding scenarios. (Initial patch by Bastien Montagne)

#include "Python.h"

#ifndef PLATFORM
#define PLATFORM "unknown"
#endif

const char *
Py_GetPlatform(void)
{
	return PLATFORM;
}