Tuya option 137

[benjaminnestler]

Description:

Implement new Option SetOption137 to reduce the MQTT traffic (if SetOption66 1) by suppressing the Tuya MCU heartbeat response.

The description of Tasmota Docs Tuya page is extended in pull request tasmota/docs#959

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.4.9
• The code change is tested and works with Tasmota core ESP32 V.2.0.3
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass

[btsimonh]

@benjaminnestler - are you actively tweaking the Tuya driver?
I've got a rework going on - it's in the testing stage - would be good if you could contribute your thoughts?
See an issue in my github, and/or in tas discussions, and/or in digiblur discord/tuya discord.
issue is here: btsimonh#11
My branch has the heartbeat suppression, but not yet the wifi state suppression.

[benjaminnestler]

hi @btsimonh,
I've switched to you discord channel with the discussion :-)