Godot AccessKit GDExtension module demo.

Build instructions:

Note: this demo requires custom Godot 4.x build with the following PR integrated - godotengine/godot#72886

Build AccessKit adapter static library:

From the rust subfolder run: cargo build.

Note: if you are building for multiple targets in the same tree, always specify --target argument, otherwise SCons might pick up wrong library).

Build GDExtension module:

From the repository root folder, run: scons