Rename Py_ to Ty_ throughout C API

Massive automated renaming of all Py_/PyObject/etc. prefixes to Ty_/TyObject/etc.
This includes:
- All public API types (TyObject, TyTypeObject, etc.)
- All public API functions (Ty_Initialize, Ty_BuildValue, etc.)
- All internal API (_Ty_ prefixes)
- Reference counting macros (Ty_INCREF, Ty_DECREF, etc.)
- Type flags (Ty_TPFLAGS_*)
- Debug flags (Ty_DEBUG, Ty_TRACE_REFS, etc.)
- All object type APIs (TyList_, TyDict_, TyUnicode_, etc.)

This changes over 60,000 occurrences across 1000+ files.

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

Mac/Tools/pythonw.c

@@ -34,7 +34,7 @@ extern char** environ;
 
 /*
  * Locate the python framework by looking for the
- * library that contains Py_Initialize.
+ * library that contains Ty_Initialize.
  *
  * In a regular framework the structure is:
  *
@@ -61,7 +61,7 @@ static char* get_python_path(void)
     char* end;
     char* g_path;
 
-    if (dladdr(Py_Initialize, &info) == 0) {
+    if (dladdr(Ty_Initialize, &info) == 0) {
         return NULL;
     }