Template Fan Support

I'm researching whether this library can fulfill my use case.

I have a Vornado fan that I am going to solder some GPIO pins to the buttons on the PCB. There's a power button and 4 speeds (will ignore one speed for Speed Fan support).

As this is not directly a float compatible setup, it doesn't seem currently possible to map ranges of a Float Output to multiple Binary Outputs. Is this true? If so, I'd consider extending the Float Output to accept a dictionary of outputs with ranges.

Example:
- `0.0 < speed <= 0.33`: low output pin
- `0.33 < speed <= 0.66`: med output pin
- `0.66 < speed <= 1`: high output pin

```yaml
output:
- platform: map
id: fan_map_output_id
power_supply: power_button_id
speeds:
low:
id: low_button_id
range: [0.0, 0.33]
medium:
id: med_button_id
range: [0.33, 0.66]
high:
id: high_button_id
range: [0.66, 1]
```

Alternatively, I suppose the Speed Fan component can be modified to associate outputs with speeds.