Touch Based Display Blanking

[NorthernMan54]

Description:

I had an interesting thought the other day, what about leveraging the ESP32 Touch sensor, and use it to enable the SSD1306 display ?

This is a quick pull request with the feature.

To enable, add 'DISPLAY_BLANKING=true' to your compiler directives, and connect a wire to DISPLAY_BLANKING_TOUCH_GPIO ( defaults to GPIO 2 ).

Then when you touch the wire, the screen turns on for 30 seconds. If you build a case, just expose the wire.

Checklist:

• [x] The pull request is done against the latest development branch
• [x] Only one feature/fix was added per PR and the code change compiles without warnings
• [x] I accept the DCO.

[1technophile]

Thanks

[NorthernMan54]

If you have a moment to give it a try, let me know what you think and I will update the documentation to mention the feature.

I have had it running on my test devices for a while, and thought it was a great feature.