Function run_build_game 

pub fn run_build_game(
    project_vfs: Option<&Arc<Mutex<ProjectVfs>>>,
    editor_state: &Arc<Mutex<EditorState>>,
)

Build Game dispatch: packs the project’s assets, copies the host-target khora-runtime binary into <project>/dist/<target>/, and writes the runtime config so the staged binary auto-loads the project’s default scene. Reports progress + final path through the editor’s logger.