Add Netatmo fan platform (#107989)

* Add fan platform

to support NLLF centralized ventilation devices

* Update tests/components/netatmo/test_fan.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update tests/components/netatmo/test_fan.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update tests/components/netatmo/test_fan.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update tests/components/netatmo/test_fan.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* add snapshots

* update snapshot

* fix docstring

* address comment

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Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>