Support Class Icon in GDExtesion

[Gallilus]

Describe the project you are working on

A GDExtension
https://github.com/Gallilus/icospheremesh-gdextension

Describe the problem or limitation you are having in your project

Using the CPP bindings I have not found how to add an icon like.
https://docs.godotengine.org/en/latest/tutorials/scripting/gdscript/gdscript_basics.html#registering-named-classes

Describe the feature / enhancement and how it helps to overcome the problem or limitation

Allow to specify an icon path to a class.

Depending on the implementation it may be needed to add the .svg to the exported extension.
But preferably it will be backed in to the executable.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

Having a third optional parameter in GDCLASS macro like
GDCLASS(IcoSphereMesh, ArrayMesh, "res://bin/IcoSphereMesh.svg")
or creating an additional macro to add the icon

If this enhancement will not be used often, can it be worked around with a few lines of script?

I do not see how to work around this.

Is there a reason why this should be core and not an add-on in the asset library?

It is a core feature supported by GDScript.
So needs support by Extension

[arkology]

godotengine/godot#75472
If I understand correctly, it's already possible

[dsnopek]

Yes, this is already implemented!

I think the problem is that you've got [Icon] in your .gdextension, when it should be [icons].