Tasmota: Rotary encoder support for H801 LED WiFi controller

Have you looked for this feature in other issues and in the docs?
Yes, there no feature "rotary encoder" exept xiaomi lamp.
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No problem.
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Wifi LED RGBWW module H801 supported by Tasmota (device #20). 5 pwm channels has level from 0 to 100 (I used all 5 channels to white stripes). It will be better adjust dimmer level with rotary encoder like KY-040. H801 has three free pins (gpio0, gpio2, gpio3).
Scenario:

• on "rotary encoder click" switch off LED/switch on LED (with level before off).
• on "rotate right" level up "dimmer level",
• on "rotate left" level down "dimmer level".

P.S. I found in Tasmota code module "ROTARY_V1", but only for Xiaomy lamp. I think, it will be suitable for H802 too.
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