flutter: Add Platform_dart and regenerate bindings

src/flutter/generated/KDDockWidgetsBindings/dart/ffi/Controllers_wrapper.h

@@ -0,0 +1,20 @@
+/*
+  This file is part of KDDockWidgets.
+
+  SPDX-FileCopyrightText: 2019-2022 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
+  Author: Sérgio Martins <sergio.martins@kdab.com>
+
+  SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
+
+  Contact KDAB at <info@kdab.com> for commercial licensing options.
+*/
+
+// tag=1040
+#include "KDDockWidgetsBindings_exports.h"
+#include <KDDockWidgets.h>
+
+extern "C" {
+
+// tag=1047
+KDDockWidgetsBindings_EXPORT void c_KDDockWidgets__Controllers_Finalizer(void *, void *cppObj, void *);
+}