Clarify documentation for C# autoloads

[sockeye-d]

Your Godot version:

4.6.dev3

Issue description:

The documentation for autoloads in C# reads quite badly:

If the Enable column is checked (which is the default), then the singleton can be accessed directly in GDScript:

PlayerVariables.health -= 10

The Enable column has no effect in C# code. However, if the singleton is a C# script, a similar effect can be achieved by including a static property called Instance and assigning it in _Ready():

public partial class PlayerVariables : Node
{
    public static PlayerVariables Instance { get; private set; }

    public int Health { get; set; }

    public override void _Ready()
    {
        Instance = this;
    }
}

The enable toggle has nothing to do with accessing the instance in C# in a type-safe manner.

I think this should be something more like this:

If the Enable column is checked (which is the default), then the singleton can be accessed directly in GDScript:

PlayerVariables.health -= 10

The Enable column has no effect in C# code. Unlike GDScript, C# doesn't have a built-in way to get autoloaded nodes by name, but a similar effect can be achieved by including a static property called Instance and assigning it in _Ready():

public partial class PlayerVariables : Node
{
    public static PlayerVariables Instance { get; private set; }

    public int Health { get; set; }

    public override void _Ready()
    {
        Instance = this;
    }
}

URL to the documentation page:

https://docs.godotengine.org/en/latest/tutorials/scripting/singletons_autoload.html

[sockeye-d]

Also, maybe

Note that autoload objects (scripts and/or scenes) are accessed just like any other node in the scene tree.

can become

Autoload nodes can be accessed just like any other node in the scene tree.

since they're almost never accessed that way, and the original sentence makes it sound like that's the main way contradictory to the previous paragraphs