Add Aquacell integration (#117117)

* Initial commit

* Support changed API
Change sensor entity descriptions

* Fix sensor not handling coordinator update

* Implement re-authentication flow and handle token expiry

* Bump aioaquacell

* Bump aioaquacell

* Cleanup and initial tests

* Fixes for config flow tests

* Cleanup

* Fixes

* Formatted

* Use config entry runtime
Use icon translations
Removed reauth
Removed last updated sensor
Changed lid in place to binary sensor
Cleanup

* Remove reauth strings

* Removed binary_sensor platform
Fixed sensors not updating properly

* Remove reauth tests
Bump aioaquacell

* Moved softener property to entity class
Inlined validate_input method
Renaming of entities
Do a single async_add_entities call to add all entities
Reduced code in try blocks

* Made tests parameterized and use test fixture for api
Cleaned up unused code
Removed traces of reauth

* Add check if refresh token is expired
Add tests

* Add missing unique_id to config entry mock
Inlined _update_config_entry_refresh_token method
Fix incorrect test method name and comment

* Add snapshot test
Changed WiFi level to WiFi strength

* Bump aioaquacell to 0.1.7

* Move test_coordinator tests to test_init
Add test for duplicate config entry