Add build folder variable to cura_wasm profile

Integrate `tools.cmake.cmake_layout:build_folder_vars` with `['settings.os']` into the `cura_wasm` profile. This change enhances the build configuration by setting up OS-specific build folders, improving the organization and potential debugging process.

Contribute to NP-637

profiles/cura_wasm.jinja

@@ -10,6 +10,7 @@ arch=wasm
 
 [conf]
 tools.build:skip_test=True
+tools.cmake.cmake_layout:build_folder_vars=['settings.os']
 
 [options]
 curaengine/*:enable_plugins=False