hassfest rejects translation keys containing uppercase letters, but the
raw Samsung enum values for flex zone, beverage zone, ice type, and ice
making status are uppercase (e.g. CV_TTYPE_RF9000A_FREEZE). Follow the
existing dryer-course pattern instead: map raw device values to
human-readable names in Python via a new SelectDesc.option_names field
(mirrored read/write in select.py) and a value_fn for the sensor, and
drop the now-unused translation_key entries from strings.json/en.json.