Added track store and updated copy to and from volatile to single template function

src/data/track_store.h

@@ -0,0 +1,13 @@
+// Copyright (C) 2026 Hector van der Aa <hector@h3cx.dev>
+// Copyright (C) 2026 Association Exergie <association.exergie@gmail.com>
+// SPDX-License-Identifier: GPL-3.0-or-later
+#pragma once
+
+#include "custom_types.h"
+#include <EEPROM.h>
+
+extern volatile track_data track_data_global;
+
+void track_global_read(track_data& out);
+int track_global_read(unsigned short idx, track_data& out);
+void track_global_write(const track_data& in);