Core: Add getPlacementOf replacing previous getGlobalPlacement logic. (#26059)

* Core: Add getPlacementOf replacing previous getGlobalPlacement logic.

* Update src/App/DocumentObject.cpp

Co-authored-by: Kacper Donat <kadet1090@gmail.com>

* Update DocumentObject.cpp

* Fix error when called from python with targetObj == None

---------

Co-authored-by: Kacper Donat <kadet1090@gmail.com>

src/App/DocumentObjectPyImp.cpp

@@ -23,6 +23,7 @@
 
 #include <Base/GeometryPyCXX.h>
 #include <Base/MatrixPy.h>
+#include <Base/PlacementPy.h>
 #include <Base/PyWrapParseTupleAndKeywords.h>
 
 #include "DocumentObject.h"
@@ -1003,3 +1004,32 @@ void DocumentObjectPy::setNoTouch(Py::Boolean value)
 {
     getDocumentObjectPtr()->setStatus(ObjectStatus::NoTouch, value.isTrue());
 }
+
+PyObject* DocumentObjectPy::getPlacementOf(PyObject* args)
+{
+    char* subname;
+    PyObject* target = Py_None;  // Initialize to None
+
+    if (!PyArg_ParseTuple(args, "s|O", &subname, &target)) {
+        return nullptr;
+    }
+
+    App::DocumentObject* targetObj = nullptr;
+
+    // Check if a target was provided and is not None
+    if (target && target != Py_None) {
+        // Now perform the type check manually
+        if (!PyObject_TypeCheck(target, &DocumentObjectPy::Type)) {
+            PyErr_SetString(PyExc_TypeError, "Target argument must be a DocumentObject or None");
+            return nullptr;
+        }
+        targetObj = static_cast<DocumentObjectPy*>(target)->getDocumentObjectPtr();
+    }
+
+    PY_TRY
+    {
+        Base::Placement p = getDocumentObjectPtr()->getPlacementOf(subname, targetObj);
+        return new Base::PlacementPy(new Base::Placement(p));
+    }
+    PY_CATCH
+}