Fjäråskupan kitchen fan (#53140)

* Add fjäråskupan fan control

* Update tests/components/fjaraskupan/conftest.py

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

* Update homeassistant/components/fjaraskupan/config_flow.py

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

* Update homeassistant/components/fjaraskupan/config_flow.py

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

* Increase manual update to 2 minutes

* Address review comments

* Switch to discovery flow

* Address more review comments

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>