Core/Entities: Added possibility to inherit StringIds from other entities (#29908)

* also implicitly do so for personal summons

src/server/game/Entities/GameObject/GameObject.cpp

@@ -3497,6 +3497,15 @@ uint32 GameObject::GetScriptId() const
     return GetGOInfo()->ScriptId;
 }
 
+void GameObject::InheritStringIds(GameObject const* parent)
+{
+    // copy references to stringIds from template and spawn
+    m_stringIds = parent->m_stringIds;
+
+    // then copy script stringId, not just its reference
+    SetScriptStringId(std::string(parent->GetStringId(StringIdType::Script)));
+}
+
 bool GameObject::HasStringId(std::string_view id) const
 {
     return std::find(m_stringIds.begin(), m_stringIds.end(), id) != m_stringIds.end();