Support for custom fan speeds

[zach-rosen]

I'm the guy who's Kumo's report 3 speeds but support 4 (superQuiet). You made changes to help support my case, but I'm still seeing the following error from HA:

2024-12-28 13:49:37.523 ERROR (MainThread) [homeassistant.components.websocket_api.http.connection] [139728785595776] Fan mode superQuiet is not valid. Valid fan modes are: quiet, low, powerful, auto

I believe that this is because the kumo/climate.py implementation of fan_modes is returning an internal variable, which overrides the customization settings I've put in the config.yaml

Kumo Climate

    def __init__(self, coordinator: KumoDataUpdateCoordinator):
        self._fan_modes = self._pykumo.get_fan_speeds()
        
    def fan_modes(self):
        return self._fan_modes

HA Climate

    @cached_property
    def fan_modes(self) -> list[str] | None:
        return self._attr_fan_modes

When the HA Climate implementation runs self._valid_mode_or_raise("fan", fan_mode, self.fan_modes), it gets the self.fan_modes Kumo reports (3):

    @final
    async def async_handle_set_fan_mode_service(self, fan_mode: str) -> None:
        """Validate and set new preset mode."""
        self._valid_mode_or_raise("fan", fan_mode, self.fan_modes)
        await self.async_set_fan_mode(fan_mode)

but accessing fan_modes from a template shows the customized values (4):

{{ state_attr("climate.living_room", "fan_modes") }}
Result type: list
[
"superQuiet",
"quiet",
"low",
"powerful",
"auto"
]

Is there a way to support the customization of fan speeds from config.yaml?