Move command modules to dedicated directory

bin/main

setup.py

tests/test_scripts.py

tutor/commands/__init__.py

tutor/commands/android.py

tutor/commands/cli.py

tutor/commands/config.py

tutor/commands/dev.py

tutor/commands/images.py

tutor/commands/k8s.py

tutor/commands/local.py

tutor/commands/ui.py

tutor/commands/webui.py

tutor/env.py

tutor/scripts.py