Add support for importing Geometry Nodes instances from .blend files

[ywmaa]

Describe the project you are working on

Any 3D Project Using the .blend importer

Describe the problem or limitation you are having in your project

importing Geometry Nodes Instances doesn't work.

it work trough GLTF though, look at this tweet:
https://twitter.com/passivestar_/status/1752195836950315347

this probably because the Godot blend importer doesn't check the option while importing.

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

Add support for checking this option (coming in Blender 4.1)

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

PR:
godotengine/godot#87735

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

N/A

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

N/A