Matthias Alphart 5550dcbec8
Add textual representation entities for Fronius status codes (#94155)
* optionally decouple `EntityDescription.key` from API response key

this makes it possible to have multiple entities for a single API response field

* Add optional `value_fn` to EntityDescriptions

eg. to be able to map a API response value to a different value (status_code -> message)

* Add inverter `status_message` entity

* Add meter `meter_location_description` entity

* add external battery state

* Make Ohmpilot entity state translateable

* use built-in StrEnum

* test coverage

* remove unnecessary checks

None is handled before
2023-11-27 13:59:25 +01:00
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