v0.8.0

Added

• Water heater cards that come with the integration. They load
  themselves on every dashboard: no resource to add, and HACS updates
  them with the integration. Details in
  docs/USING.md.
  • custom:icomm-water-heater-card: Home Assistant's own dial, with a
    spinner beside Target from your first tap until the tank's own data
    shows the new value, and a red line if it never does. Also power, time
    to recover, hot water available, the mode buttons, and Vacation with a
    number of days.
  • custom:icomm-water-heater-tile: one row with the current
    temperature, the mode's icon, power and time to recover. Tap opens the
    full card in a popup; long-press opens more-info.
  • Repeated taps: taps on + or − count from the value on its way to
    the tank, not from the old setpoint, so the number doesn't jump back
    while a change is in flight.