* Lazy loading of service descriptions
* Fix tests
* Load YAML in executor
* Return a copy of available services to allow mutations
* Remove lint
* Add zha/services.yaml
* Only cache descriptions for known services
* Remove lint
* Remove description loading during service registration
* Remove description parameter from async_register
* Test async_get_all_descriptions
* Remove lint
* Fix typos from multi-edit
* Remove unused arguments
* Remove unused import os
* Remove unused import os, part 2
* Remove unneeded coroutine decorator
* Only use executor for loading files
* Cleanups suggested in review
* Increase test coverage
* Fix races in existing tests
Add the amount of remaining time before a timer is finished in its state attributes, so that it is received when fetching a timer state.
In my particular case, it allows me to correctly implement a UI for a timer when it is paused and when the UI didn't received the pause state change (which happens when the UI is started after the pause). In this case, it is impossible to show the remaining amount of time before the timer ends.