The input subitem for the AC quiet mode was misspelled 'queit'. The code
now uses 'quiet' and still accepts 'queit' for backward compatibility;
docs updated accordingly. Removing the alias is tracked in BACKLOG.md.
Cross-checked all channel types, suffixes, commands, JSON config formats,
HTTP/MQTT API examples and driver docs with the actual code; fixed the
discrepancies (channel numbers 0..23, real command set, real suffix handling,
CAN 50 kbit/s, DRY/Freeze sprinkler semantics, AC subitems, multivent zones,
Mercury/Motor/Counter configs, etc.)