Add Poiema Fan Support (#5320)
* Add new devices Poiema Fan
* Rename Poiema Fan to Fan in configuration
* Fix error: Entity name Temperature hides class translation.
* update entity definitions and improve consistency
* Remove no need fields
* Rename timer options for consistency in value representation
* fix (poiema_fan): quote icon, drop unnecessary one
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Co-authored-by: Jason Rumney <make-all@users.noreply.github.com>