[FEATURE] Added UNICADO header to empennage design

Added unicado header to empennage_design.

empennage_design/src/bwb/vertical_tails/low/LowVerticalTailsBwb.cpp

-/**
- * \file LowVerticalTailsBwb.cpp
- * \author Christopher Ruwisch (christopher.ruwisch@tu-berlin.de)
- * \brief Source file for low fidelity vertical tails design for blended wing body
- * \version 0.1
- * \date 2023-11-15
+/*
+ * UNICADO - UNIversity Conceptual Aircraft Design and Optimization
  *
- * @copyright Copyright (c) 2023
+ * Copyright (C) 2024 UNICADO consortium
  *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * Description:
+ * This file is part of UNICADO.
  */
 
 #include "LowVerticalTailsBwb.h"