Function stop

subprojects/llama.cpp/common/console.cpp:1099–1114

            });
        }
        void stop() {
            {
                std::unique_lock<std::mutex> lock(mtx);
                if (simple_io || !running) {
                    return;
                }
                running = false;
                cv_stop.notify_all();
            }
            if (th.joinable()) {
                th.join();
            }
            replace_last(' ');
            pop_cursor();
            fflush(out);
        }
    }

    void log(const char * fmt, ...) {