- Switched back to custom window management, taking another stab

- Refactored lang yet again, `fennec/lang` is now C++ language. `fennec/string` `fennec/filesystem` and `fennec/format` are now independent.

test/tests/string/test_string.h

@@ -0,0 +1,57 @@
+// =====================================================================================================================
+//  fennec, a free and open source game engine
+//  Copyright © 2025  Medusa Slockbower
+//
+//  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/>.
+// =====================================================================================================================
+
+///
+/// \file test_string.h
+/// \brief
+///
+///
+/// \details
+/// \author Medusa Slockbower
+///
+/// \copyright Copyright © 2025 Medusa Slockbower ([GPLv3](https://www.gnu.org/licenses/gpl-3.0.en.html))
+///
+///
+
+#ifndef FENNEC_TEST_LANGPROC_STRINGS_STRING_H
+#define FENNEC_TEST_LANGPROC_STRINGS_STRING_H
+
+#include <fennec/string/string.h>
+
+#include "../../test.h"
+
+namespace fennec::test
+{
+
+inline void fennec_test_langproc_strings_string() {
+
+	string test0 = string("test0");
+	string test1 = string("test1");
+
+	fennec_test_run(test0, test0);
+	fennec_test_run(test1, test1);
+
+	fennec_test_spacer(1);
+
+	fennec_test_run(test1 = test0, test0);
+
+}
+
+}
+
+#endif // FENNEC_TEST_LANGPROC_STRINGS_STRING_H