* Add support for learning new commands
This update creates a generic service in the 'remote' component to enable remote control platforms to learn new commands.
* Update __init__.py with the proposed changes
- Add 'supported_features' property and a constant related to the 'learn_command' functionality.
- Redefine 'async_learn_command' function as a coroutine.
* Update __init__.py
* Fix assertion error
Adding the 'supported_features' attribute generated an assertion error on the 'Demo Remote' platform. This update fixes this.
* Fix duplicated 'hass' object
This update fixes a typo that occurred at the last update.
