Request to Add target=dotnet_bindings Build Option for Generating C# Bindings Without 3D Module Dependency

[Dx-hualuo]

I developed a music player using C# in Godot and encountered excessive build size when exporting through the official editor. To address this, I used the Godot build options generator to create a custom export template with 3D features disabled (disable_3d=yes). However, when running the exported project, I encountered an error related to a missing 3D method:

ERROR: System.TypeInitializationException: The type initializer for 'Godot.Viewport' threw an exception.
---> Godot.GodotObject+NativeMethodBindNotFoundException: Unable to find the native method bind. (Method 'Viewport.xxxxxx')

This suggests the official C# GodotSharp package failed to bind properly with the 3D-disabled export template. Following the documentation (Compiling with .NET), I attempted to generate C# bindings using:

<godot_binary> --headless --generate-mono-glue modules/mono/glue

However, building a 3D-disabled editor for this purpose failed with:

ERROR: Build option `disable_3d=yes` cannot be used for editor builds, only for export template builds.

Request:
Please add a target=dotnet_bindings build option to directly generate C# bindings without requiring editor compilation. This would allow developers to create optimized export templates (e.g., 3D-disabled) while maintaining proper C# binding compatibility, bypassing the current limitation where editor builds enforce 3D module dependencies.

[AThousandShips]

Closing in favor of proposal:

• Add target=dotnet_bindings SCons option to generate C# bindings without 3D nodes dependency #12106