Feature request: Expose presets to MQTT

[Waylikemark]

At this moment HA only knows the % of the fan speed so using the new Tile card with fan speed presets is not possible. Adding the low, medium, high presets to the mqtt message should solve this.

[stale[bot]]

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[jpelgrom]

I don't believe this is possible with the current setup:

• Home Assistant shows off/low/medium/high buttons for fans only if there are less than 4 possible speed values (see note below screenshot), but for Itho it is always 0-100% with 1% steps which uses a slider
• you can have presets in addition to speed, but presets in Home Assistant refer to modes such as an automtic mode, eco mode, etc., specifically not speed settings

You could get these buttons by changing the message to reduce the number of available speeds, but I think that is a worse experience by default and would require work to translate the percentages to actual low/medium/high values which might be different.