* Refactor template entity to allow reuse
* Fix schema and default name
* Add tests
* Update requirements
* Improve test
* Tweak TemplateSensor initializer
* Drop attributes and availability from TemplateEntity
* Use rest sensor for proof of concept
* Revert changes in SNMP sensor
* Don't set _attr_should_poll in mixin class
* Update requirements
* Teach TemplateEntity entity name
* Remove default name from number and select config schemas
* Re-add default name to number and select config schemas
* Set name to None if name template fails to render
* Update template button
* Convert template lock to use async_track_template_result
* Convert template switch to use async_track_template_result
* Convert template fan to use async_track_template_result
* Convert template alarm_control_panel to use async_track_template_result
Most of the the template platforms would check for
extract_entities failing to extract entities and avoid
setting up a state change listner for MATCH_ALL after
extract_entities had warned that it could not extract
the entities and updates would need to be done manually.
This protection has been extended to all template platforms.
Alter the behavior of extract_entities to return the
successfully extracted entities if one or more templates
fail extraction instead of returning MATCH_ALL
* Added support for template alarm panel
* Rewrote tests in new async format
* Fix stale docstring
* Update to tests, standardization on NAME vs FRIENDLY_NAME
