Tuya fan percentage fix

[fOmey]

Breaking change

Proposed change

Add "natural wind" mode to tuya fans & calculate speed percentage range with a minimum value of 1.

Natural wind being a pulsing fan mode.

0% as a speed percentage is invalid for fs & fsd.

Without these changes the lowest fan speed is displayed as 0% on the slider.. more importantly this causes a undesired effect of the fan turning off when trying to enter the slowest speed setting. In the case of fs, setting a speed percent between 1-16% turns off the fan.

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[probot-home-assistant]

Hey there @tuya, @zlinoliver, @METISU, @frenck, mind taking a look at this pull request as it has been labeled with an integration (tuya) you are listed as a code owner for? Thanks!
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[frenck]

Thanks, @fOmey 👍

This makes a lot of sense in case e.g., 6 speeds are communicated as a percentage (of which we now know, Tuya does).