* Add sensors for HVAC filter usage
The number of hours and the number of days are not linked.
The number of hours is a sum of the hours the filter has been in use (fan running). The days is just the number of days since the filter was reset.
* Update filter sensors' names
* Split consumables entity descriptions and move names to translations
* Scale filterHours to match real-world time
It looks like the integer returned by the thermostat is actually 100 times the number of hours.
* Address review comments/changes