Delta Dore Tydom thermic-level thermostat

Summary Adds support for Tydom HVAC endpoints that expose only `thermicLevel` mode data instead of full thermostat temperature data. The new thermostat path keeps the accessory as a single HomeKit Thermostat service and maps the available Tydom modes onto HomeKit states: `STOP` -> off `COMFORT` -> heat `ANTI_FROST` -> cool `AUTO` -> auto `ECO` -> low target temperature Why Some Tydom HVAC endpoints do not provide `setpoint`, `temperature`, or `hvacMode`, which caused the regular thermostat handlers to throw missing-property errors. The previous linked-switch fallback could also expose …

Excerpt saved from GitHub on 2026-10-22.