Integration/Components/norway_air- Level text

Feature Requests
1

Ref: core/homeassistant/components/norway_air/ @Danielhiversen

Would be informative if the integration also had the appropriate level text for pollution level like:

@property
def level_text(self):
    """Return the index text of this entity, if any."""
    level = self._api.data.get("level")
    
    if level = 'low':
      text = 'Lite - Liten eller ingen risiko for helseeffekter'
    elif level = 'medium':
      text = 'Moderat - Moderat helserisiko'
    elif level = 'high':
      text = 'Høy - Betydelig helserisiko'
    elif level = 'severe':
      text = 'Svært høy - Alvorlig helserisiko'
    return text

or if its possible to pick up the text from the data provider(?). This way no extra sensor has to be made.

Cheers.
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