Chiller plugin update
- Better readability for chiller example.
- Remove on_power_change signal for chillers as it cannot work without a signal from the energy plugin. The power consumption of the chiller is evaluated a posteriori when an update is triggered.
- Add get_time_to_goal_temp, giving the time before reaching the goal temp of the room managed by the chiller.
- Improve comments on examples battery-connector and battery-chiller-solar
- Add more plugin info in changelog and release note
- Fix chiller doc not showing