Hassil intents (#85156)

* Add hassil to requirements

* Add intent sentences

* Update sentences

* Use hassil to recognize intents in conversation

* Fix tests

* Bump hassil due to dependency conflict

* Add dataclasses-json package contraints

* Bump hassil (removes dataclasses-json dependency)

* Remove climate sentences until intents are supported

* Move I/O outside event loop

* Bump hassil to 0.2.3

* Fix light tests

* Handle areas in intents

* Clean up code according to suggestions

* Remove sentences from repo

* Use home-assistant-intents package

* Apply suggestions from code review

* Flake8

Co-authored-by: Paulus Schoutsen <balloob@gmail.com>