Auto-exit after `tns test` completes and allow for console output collection

The currently recommended approach to running tns test in a CI environment is to use the --justlaunch switch, so that tns exits after the test run completes.

• We need a way to run without --justlaunch, so we show console.log and other output to the user and let CI systems collect it in their build logs.
• We also need a --timeout parameter that will kill the test run if it doesn't complete in X minutes/seconds.

從 tns test 命令開始，追蹤現有的 --justlaunch 行為。透過保留 CI 所需的主控台輸出、加入 --timeout 參數，並在測試執行完成或逾時時自動結束測試執行，來定義完成條件。