Adds a new artificial "Off" mode for dustbin_mode,
which will allow avoiding the need to expose both a toggle and a select
in homeassistant.
This changes the behavior of the existing mode selection, as it is not
anymore possible to change the mode without activating the auto
collection.
* Mode is Off, if auto collection has been disabled
* When setting mode to "Off", this will disable the auto collection
* When setting mode to anything else than "Off", the auto collection
will be automatically enabled.
Initial implementation for dustbin auto-emptying.
New features:
- `dustbin_empty` action to empty the dustbin immediately
- `dustbin_autocollection_enabled` to toggle the auto collection
- `dustbin_mode` to choose how often the auto collection is performed
