Add parent ID parameter to node creation functions in Rust and C++

src/StardustBridge.cpp

@@ -160,7 +160,8 @@ StardustBridge::NodeId StardustBridge::createNode(const std::string& name,
         float m[16];
         // GLM mat4 is column-major; pass as 16 floats as-is
         std::memcpy(m, &transform[0][0], sizeof(m));
-        std::uint64_t rid = m_fnCreateNode(name.c_str(), m);
+        std::uint64_t parentVal = parent.has_value() ? *parent : 0;
+        std::uint64_t rid = m_fnCreateNode(name.c_str(), m, parentVal);
         (void)rid; // Could map to NodeId if Rust returns its own id
     }
     return id;