Add config flow to Stookalert (#57119)

.coveragerc

.strict-typing

CODEOWNERS

homeassistant/components/stookalert/__init__.py

homeassistant/components/stookalert/binary_sensor.py

homeassistant/components/stookalert/config_flow.py

homeassistant/components/stookalert/const.py

homeassistant/components/stookalert/manifest.json

homeassistant/components/stookalert/strings.json

homeassistant/components/stookalert/translations/en.json

homeassistant/generated/config_flows.py

mypy.ini

requirements_test_all.txt

tests/components/stookalert/__init__.py

tests/components/stookalert/test_config_flow.py