Missing support for tcx systems

[CamTosh]

👋 Hi, can you explain me why the tcx device type isn't supported?

homeassistant  | 2023-10-02 11:50:04.244 DEBUG (MainThread) [iaqualink] <- 200 OK - https://r-api.iaqualink.net/devices.json?api_key=....&authentication_token=....&user_id=...
homeassistant  | 2023-10-02 11:50:04.244 WARNING (MainThread) [iaqualink] tcx is not a supported system type.

[dkvdm]

I second this request; I would love to see TCX support.