I have added documentation for `PyInterpreterState_Main()`.
I chose to place it under Advanced Debugger Support together with similar functions like `PyInterpreterState_Head()`, `PyInterpreterState_Next(`), and `PyInterpreterState_ThreadHead()` .
https://bugs.python.org/issue36157
Return the interpreter state object at the head of the list of all such objects.
+.. c:function:: PyInterpreterState* PyInterpreterState_Main()
+
+ Return the main interpreter state object.
+
+
.. c:function:: PyInterpreterState* PyInterpreterState_Next(PyInterpreterState *interp)
Return the next interpreter state object after *interp* from the list of all
--- /dev/null
+Added Documention for PyInterpreterState_Main().
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