Debounce config file change event

[JunganSe]

Change event is triggered twice when the program is updating the file (normal behavior) and also when Notepa++ saves the file.
Debounce the event so that it is not run if it was just recently triggered.

[JunganSe]

ChatGPT suggestion:

private Timer _debounceTimer;

private void OnChanged(object sender, FileSystemEventArgs e)
{
    _debounceTimer?.Dispose();
    _debounceTimer = new Timer(_ =>
    {
        // Your logic here (runs after events settle)
        HandleFileChange(e.FullPath);
    }, null, 250, Timeout.Infinite); // Delay of 250ms
}