Simplifying C# node class properties with a source generator

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In case anybody finds writing all those properties with backing fields too verbose, specially when it comes to tool classes, here is a Rightand.GodotPropertyChangedGenerator that will generate much of the code for you.

From readme, instead of

private int _simpleExportedWithDefault = 5;

public int SimpleExportedWithDefault
{
	get => _simpleExportedWithDefault;
	set
	{
		if (_simpleExportedWithDefault != value)
		{
			_simpleExportedWithDefault = value;
			UpdateState(nameof(SimpleExportedWithDefault));
		}
	}
}
private void UpdateState(string? propertyName)
{
	QueueRedraw();
}

you’d write

[Export, DefaultValue(5)] public partial int SimpleExportedWithDefault { get; set; }

private void UpdateState(string? propertyName)
{
	QueueRedraw();
}

And much more.