* 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
